(Turcz. Bull. Phys.-Math. Acad., Petersb., 10, p. 338, 1852.) Gooseberry Mallee.

Systematic. - A "Mallee" growing in wetter situations than generally obtains in this class of Eucalypts (W. Gill). Abnormal leaves sometimes alternate, or shortly petiolate, sessile, narrow, elliptical or lanceolate, mucronate, about 1 inch long. Normal leaves lanceolate, thick, acuminate, hooked, shining, about 3 inches long and 1/2 inch wide; intramarginal vein parallel to and shortly removed from the edge, venation not prominent. Flowers in axillary umbels, common peduncle about 3 lines long. Buds about 7 lines long, covered with oil glands;

calyx tube almost sessile, prominently ribbed, tetragonal, tapering gradually to the base; operculum smooth, conical, reddish in colour, about one-third as long as the calyx tube.

Fruit. - Urn shape is perhaps the nearest term that describes the form, four to five prominent raised ribs giving it an angular appearance, shining; rim thin, circular; valves deeply inserted; about 5 lines long and 3 lines wide.

These fruits are so nearly in shape to those of E. ochro-phloia that it is just possible this may eventually prove to be the southern form of that species.

Habitat. - Victoria, South Australia, Western Australia.

REMARKS. - At the writing of our first edition, this species had not been placed by us nor was the oil at that time obtainable. Recently, Mr. Walter Gill supplied material for this investigation, and so its systematic position now presents no difficult'.

Plate XXXI

[Photo]

[Waller Gill].

Eucalyptus Calycogona. Turcz. Gooseberry Mallee

ESSENTIAL OIL. - Leaves and terminal branchlets for distillation were forwarded by Mr. Walter Gill, the Conservator of Forests, South Australia. The material was collected at the Parilla Forest Reserve, South Australia, in October, 1919. The yield of oil was 1 per cent.

The crude oil was of an orange-brown colour, and had an odour similar to those of the cineol-pinene group; volatile aldehydes were not pronounced. The constituents present were dextro-rotatory pinene, cineol, alcoholic bodies, esters and some sesquiterpene. Phellandrene was not present.

The crude oil had specific gravity at 150 C. = 0.9152; rotation aD + 7.6°; refractive index at 200 = 1.4659, and was soluble in 5 volumes 70 per cent, alcohol. The saponification number for the esters and free acid was 7.3. After acetylation it was 36.3, and 28.5 in the cold with 2 hours' contact. This result represents 8 per cent, of free alcohols calculated for the C10Hl8O molecule. On rectification, 1 per cent. distilled below 1610 C. (corr.). Between 161-1710, 30 per cent, distilled; between 171-1930, 54 per cent, came over; between 193-2250, 5 per cent. distilled, and between 225-2670, 8 per cent. These fractions gave the following results: -

The cineol was determined by the resorcinol method in the portion distilling below 1930 C.; when calculated for the original oil, the result was 55 per cent. By the phosphoric acid method it was 50 per cent., thus indicating but a small proportion of absorbable bodies, other than cineol, in the oil distilling below 1930.