Oblong-oval: lower eye more advanced than the upper one: lateral line straight throughout its course: body everywhere smooth: lower jaw longest: teeth cutting.

P. Pola, Cuv. Reg. An. torn. ii. p. 339. New species of Platessa, Edinb. New Phil. Journ. no. 37. July, 1835. p. 210.

Length

Seventeen to nineteen inches.

Description

{Form). Oblong-oval, approaching the form of the Sole: greatest breadth, dorsal and anal fins excluded, rather exceeding one-third of the entire length; body narrowing both ways from that point, but more towards the tail than the head: length of the head half the breadth of the body: mouth very small; lower jaw longest; commissure of the lips, when the mouth is closed, nearly vertical: teeth cutting, set closely together, with even summits, extending the whole length of the jaws: eyes on the right side, large, placed obliquely, the lower one being more advanced than the upper, close together, with an osseous ridge between; diameter of the orbit equalling one-third the length of the head: lateral line almost perfectly straight throughout its whole course, but not exactly parallel to the axis of the body, inclining slightly upwards anteriorly; half-way, its course is found to be a very little above the mesial line: skin smooth above and below: scales large: dorsal fin commencing above the eye, at a distance from the end of the snout equalling nearly half the length of the head; rays short at first, but doubling their length beyond the line of the pectorals; from that point nearly even throughout; greatest elevation of the fin contained five times and a half in the breadth of the body: anal commencing just opposite the point at which the dorsal rays begin to lengthen, answering to that fin, and terminating in the same line, a little before the caudal: caudal rounded at the extremity; its length equalling half the breadth of the body: pectorals attached just behind the posterior angle of the opercle, their length about half that of the head: ventrals immediately beneath them, of the same length.

* See Hanmer's observations on the genus Pleuronectes, in the Appendix (No. 5). to the third volume of the last edition of Pennant's " British Zoology." † Edinb. New Phil. Journ. 1. c.

D. 109; A. 93*; C. 19; P. 12; V.6.

{Colour of a specimen in spirits). Yellowish brown.

The above description of this species, which is a recently acquired addition to the British Fauna, was taken from a specimen in the Museum of the Zoological Society, procured in the London market, in May, 1833. Mr. Yarrell has another from the Frith of Forth, sent him by Mr. R. H. Parnell, by whom it appears to have been considered as an undescribed species †. This last gentleman states that it is known to the fishermen in that neighbourhood under the appellation of Craig Fluke. I have ventured to suggest the English name of Pole, as being in unison with the Latin name which it has received from Cuvier.