FLATFISH. 139 
follows the dorsal profile to the vertical, from the 
opercular angle, where it terminates—it commu- 
nicates with the true lateral line by a branch; the 
dorsal fin rises over about the anterior third of 
the orbit, and terminates at a distance from the 
caudal equal to the breadth of the eye; anal 
spine prominent; pectoral fin half as long as 
the head. Colour, light greyish-brown, with 
lighter blotches. More abundant at San Fran- 
cisco than at Vancouver Island and north of the 
Fraser. 
Pleuronectes digrammus (Giinther, Brit. Mus. 
Catalogue, ‘ Fishes,’), the ‘Two-lined Flounder 
(Noy. Spec.).—Sp. Ch.: The height of the body 
rather less than one-third of the entire length, 
the length of the head two-ninths, and that 
of the caudal two-thirteenths; snout with the 
lower jaw prominent, equal in length to the di- 
ameter of the eye, which is nearly one-fifth of 
that of the head; maxillary as long as the eye; 
the upper jaw with a series of twenty-eight 
small truncated teeth on the blind side, those of 
the other side being few in number and very 
small; eyes separated by a very narrow, naked, 
bony ridge; scales small but conspicuous; lateral 
line, with a very slight curve above the pectoral ; 
a second series of pores commences above the 
