444 PLETTEONECTIDiE. 



total length (without caudal), the length of the head one-third. The 

 greatest depth between the anal fin and the straight portion of the 

 lateral line is a little less than the length of the head. Scales none ; 

 head, the coloured side and the anterior half of the blind side with 

 numerous small, star-Uke, spiny tubercles ; a series of these tubercles 

 runs on each side of the base of the dorsal and anal fins and on each 

 side of the lateral line. The lateral line is smooth, with a slight 

 curve above the pectoral, the depth of the curve being much less than 

 the width of the base of the pectoral. Snout as long as the eye, the 

 diameter of which is one-fifth or one-sixth of the length of the head. 

 Lower jaw prominent, lips moderately broad, maxillary longer than 

 the eye. Upper jaw with a series of about twenty narrow, closely- 

 set, truncated teeth on the blind side, those of the other side being 

 smaller. Eyes generally on the left side, separated by a very narrow 

 ridge, covered mth star-like tubercles ; the lower eye slightly ia 

 advance of the upper. A short prominence above the upper angle of 

 the operculum. The dorsal commences above the middle of the eye, 

 and terminates at some distance fi'om the caudal, that distance being 

 equal to the depth of the tail. The length of the pectoral is contaiaed 

 twice and a third in that of the head. The dorsal rays about the 

 thirty-second are the longest, more than half as long as the head. A 

 spine before the anal. Gill-rakers lanceolate, not half as long as the 

 eye. Dark-brown ; dorsal and anal with four, caudal with thi-ee black 

 bands nmnitig in the direction of the rays. 



Kamtschatka. Vancouver Islands. CaHfomia. 



a. Half-grown. Coronation Gulf, Behring's Straits. From the Haslar 



Collection. 

 h. Adult : skia. Esquimault Harbour. Presented by Earl Russell. 

 c-f. Young. Eraser's River. Voyage of H. M. S. Plumper. 

 ff, h. Adult : not good state. 



8. Pleuronectes bilineatus. 

 Platessa bilineata, Ayres in Proc. Calif. Acad. 1855, p. 40. 

 D. 77. A. 59. 

 The height of the body is a little less than one-half of the entire 

 length, the length of the head nearly one-fourth. Snout somewhat 

 projecting, not continuous in dii'cction with the descending profile 

 of the nape. Eyes on the right side, large, their diameter being 

 two-sevenths of the length of the head, separated by a strong pro- 

 minent ridge which is partly covered with scales. Lower jaw pro- 

 minent. A single, even row of strong, blunt, conical (?) teeth in 

 each jaw, less developed on the coloured side than on the blind. 

 Scales very conspicuous, those on the head and on the tail ciliated. 

 Lateral line with a strong curve above the pectoral : a second series 

 of pores commences above the eye, and follows the doi'sal 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 arises 

 over about the anterior third of the orbit, and terminates at a distance 



