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 

 (Nov. 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 



