On earth-covered stumps and bare clayey soil about Dawson, Yukon, 1899. (Williams.)

187. B. tortuosa, (Linn.) Web. & Mohr.

On limestone rocks, Credit Forks, Ont., Sept., 1892. (Jos. White.) On dry earth, Moose Mountain, Elbow River, Rocky Mountains, Alta., June, 1897; on rocks in a ravine at Margaree, Cape Breton Island, N.S., July, 1898; abundant and fruiting on rocks, Aroostook Falls, N.B., Sept., 1899; on sand under trees, Pelee Point, Essex Co., Ont., 1901. (Macoun.)

188. B. inclinatula, C. M. & Kindb.

Sterile specimens collected on limestone rocks along the Niagara River, near Queenston, Ont., May 13th, 1901, are doubtfully referred here. (Macoun.)

189. B. fragilis, (Drumm.) Wils.

On earth, Jumping Pound Creek bridge, Alta., June, 1897. (Macoun.) On earth in damp shady places at Dawson, Yukon, 1899. (Williams.)

190. B. csespitosa, SCHWaeGER.

Abundantly fruiting at the bases of trees in woods, Pelee Point, Essex Co., Ont., May 27th, 1901; on the bases of old stumps in a swamp at Wyoming, Lambton Co., Ont, June 14th, 1901. (Macoun.)

*

200. B. fallax, Hedw.

On earth, Parson's Mountain, near Victoria, Vancouver Island, May 15 th, 1893. (Macoun.)

201. B. recurvifolia, Schimp.

A specimen collected in the Crow's Nest Pass, Rocky Mountains, Aug. 20th, 1897, was named by Kindberg B. reflexa, var. virescens, or a new species. I place it here for the present. (Macoun.) Growing in large tufts on rocks at Dawson, Yukon, 1899. (Williams.)

205. B. spadicea, Mitt.

On earth near the Indian village, Comox, Vancouver Island, June, 1893. (Macoun.)

206. B. unguiculata, (Huds.) Hedw.

On earth in ditches at Baddeck, Cape Breton Island, N.S., July, 1898; not rare on earth at Queenston, Ont. (Macoun.)

207. B. brachyphylla, Sulliv. var. angustifolia, Kindb.

(N.var.)

Leaves ovate-lanceolate, broadly acuminate, subobtuse, nearly smooth, slightly reflexed or partly flat at the borders, crowded, appressed when dry; cells subpellucid, subquadrate; costa red and thick, principally above, percurrent. Capsules unknown. On calcareous rocks, Deer Park, Lower Arrow Lake, Columbia River, B.C., June 8th, 1890. (Macoun.)

213. B. circinnatula, C. M. & Kindb.

This is a common species on Vancouver Island on damp or wet rocks. It has been collected at Craigflower, Goldstream, along the Colquitz River and other places near Victoria, and at Sooke, 25 miles to the southwest of it, 1893. (Macoun.)

214. B. horridifolia, C. M. & Kindb.

On damp rocks in the Eagle Pass, Gold Range, B.C., May 23rd, 1890; on wet rocks, Colquitz River near Victoria, Vancouver Island, 1893. (Macoun.)

215. B. convoluta, Hedw.

All eastern references found under this species in Cat. Can. Musci, 57, belong here. All western to the next species.

On limestone rocks, Credit Forks, Ont., Sept., 1892. (Jas. White.') On earth at Queenston Heights, Ont., May 8th, 1901. (Macoun.)

216. B. chysopoda, C. M. & Kindb.

This species is quite common on Vancouver Island, and is easily separated from B. convoluta by its long capsule and lid.

217. B. subulata, (Linn.) Beauv.

On earth, Skull Creek, Crane Lake, Assa., June, 1894; on Bragg's Creek, Elbow River, Rocky Mountains, June, 1897; on earth on rock, Niagara River, Ont.; also on Pelee Point, Essex Co., Ont., 1901. (Macoun.) On earth in rather dry places at Dawson, Yukon, 1899. (Williams.)

218. B. mucronifolia, Bruch & Schimp.

Crevices of limestone rocks, Rockcliffe Park, Ottawa, Ont., May, 1900. (Macoun.)

220. B. ruralis, (Linn.) Hedw.

On sand along the sea-beach at Comox, Vancouver Island, May 2nd, 1887; in sand under trees, Pelee Point, Essex Co., May, 27th, 1901. (Macoun.) On rocks, Unalaska Island, Behring Sea, Sept., 1892. (J. M. Macoun.) On rocks about lakes Lindeman and Bennett, Yukon, 1899. (Williams.)

222. B. aciphylla, Bruch & Schimp.

All references to B. aciphylla in part VI. belong here, except that of Roger's Pass, which belongs to the next.

On earth by the Indian cemetery, Comox, Vancouver Island, June, 1893. (Macoun)

999. B. pseudo-aciphylla, Kindb. in Hedwigia, 1896, 63.

Leaves long, sublinear-lingulate; obtuse; costa very rough above; hair-point red only at the base or in the upper half. Capsule narrower than in B. norvegica; peristome not seen.

On mountain slopes at discharge of Devil's Lake, Banff, Rocky Mountains, Alta., July 1st, 1891. (Macoun.)

223. B. megalocarpa, Kindb.

Our undoubted specimens of this species are: - On rocks, Cypress Hills, Assa., Aug. 3rd, 1880; at Yale, B.C., July 17th, 1889; in Eagle Pass, near Revelstoke, B.C., May 13th, 1890; along Cadboro Bay and the Burnside Road, Victoria, Vancouver Island, 1887 and 1893. (Macoun)

1000. B. Submegalocarpa, Kindb. in Hedwigia, 1896, 64.

Differs from B. ruralis: Leaves longer, narrow and less reflexed above, from a broader base alternate or sublinear; outer basal cells golden yellow; not porose; hair-point often red in the lower half. Peristome faintly contorted, shorter than the tube. On damp rocks at Sicamous, B.C., July 4th, 1889. (Macoun.)

224. B. laevipila, Bruch & Schimp.

On trees, Vancouver Island. (Roell.)

227. B. papillinervis, C. M. & Kindb.

On rocks at Clearwater Lake, Labrador, Aug., 1898. (A. P. Low.)

944. B. laeviuscula, Kindb.

On rocks in the Crow's Nest Pass, Rocky Mountains, Alta., Aug. 20th, 1897; at the base of trees near Victoria, Vancouver Island, May 17th, 1893. (Macoun.)

941. B. vinealis, Braun.

On banks by the sea at Comox, Vancouver Island, June, 1893. (Macoun.)

1001. B. subcuneifolia, Kindb., Revue Bryol. 1896.

Leaves suboval-ovate, sometimes acute or apiculate, slightly reflexed below, larger than in the last and not crisped; costa not excurrent, finally red-brown. Capsule as in the last; peris-tomial tube more prominent. Monoecious.

On rocks, St. Matthew's Island, Behring Sea, Aug. 10th, 1891. (J. M. Macoun.)

1002. B. Waghornei, Kindb., Bryol. N. Am. & Eur., 264.

Leaves from a short ovate, half-sheathing base to a long acuminate, acute, entire point, slightly reflexed a little above the base, faintly curled when dry; costa red. Tufts brown-red radicu-lose. Habit of Didymodon rubellus.

Rather rare. Newfoundland. (Waghorne)

BRYOBRITTONIA, R. S. Williams, gen. nov.

Closely related to Tortula and Desmatodon, from which it is distinguished by the mamillose leaves, the exposed surfaces of the very distinct cells being highly convex. From Trichostomum and Timmiella it is distinguished by the costa with only one stereid band; the first of these also has the leaves smooth or papillose and the second has a leaf lamina of two layers of cells, mamillose on the upper surface only.

This genus is dedicated to Mrs. Elizabeth G. Britton, by whose aid so many American students of our mosses have been encouraged.

1003. B. pellucida, R. S. Williams.

With much the habit of Tortula latifolia but leaves much longer and narrower above. Stems mostly simple, radiculose below, in loose, rather dark green tufts up to 2 cm. high, in cross-section irregularly oval (about .320 mm. long) with walls of two or three rows of slightly thickened irregular cells, ground tissue of large thin-walled cells, surrounding a distinct central strand of numerous small thin-walled cells. Terminal leaves (often enclosing numerous long paraphyses-like hairs) oblong-lanceolate, up to 7.5 mm. long and 1.5 mm. broad, plicate and somewhat crispate when dry or rarely nearly straight, mamillose on both faces except dorsal side of costa, crenulate-serrate on flat borders in upper half, obtusely or somewhat acutely pointed, with stout costa (.140 mm. wide near base) long-decurrent on stems and vanishing several cells below apex. Lower leaves ovate-oblong (about 3 mm. long). Leaf cells above rhomboidal to hexagonal, about .016 mm. in diameter, becoming gradually elongated below and hyaline, the cells near margin a little above base .004-.006 mm. wide and up to .160 mm. long, toward costa .020-.025 mm. wide and up to .100 mm. or more long. Cross-sections of costa show in the ventral half about 4 guide-cells with a few accessory cells or even 1 or 2 rows of accessory cells nearly as large, in addition to the row of mamillose cells on ventral surface. The dorsal half of costa consists of a stereid band, the outer row of cells a little larger than the others with a distinct central strand of small, irregular, thin-walled cells.

Yukon River bluff, just below Dawson, Yukon, April 16th, 1899. (Williams)