442 PlETTRONECTIDiE. 



3. Pleuronectes latus. 



Cuvier, li^gne Anim. 



A series of six bony tubercles from the eye to the origin of the 

 lateral line, as in PI. platessa, but the height of the body is coiitained 

 only once and a half in its length. (Cuv.) 



Very rare on the coasts of France. Is not this species founded on 

 deformed specimens of Fl. platessa ? 



4. Pleuronectes franklinii. 



Pleuronectes glacialis, Richards. Faun. Bor.-Ame^: Fish. p. 258, and 

 Voy. Herald, Fishes, p. 166. pi. 32 (not Pall). 



D. 56. A. 37. Vert. 13/27. 



The height of the body is contained twice and a fourth in the total 

 length (with the caudal), the length of the head four times and a 

 third, that of the caudal fin six times. The greatest depth between 

 the anal and the lateral line is a little more than the length of the 

 head. Scales rudimentary and not imbricate on the head and on the 

 anterior part of the body, very small on the tail ; a broad rugose 

 ridge between the upper eye and the lateral Hue ; body entirely smooth 

 on both sides ; lateral line straight. Snout as long as the eye, the 

 diameter of which is one-sixth of the length of the head. Lower jaw 

 prominent, cleft of the mouth small, maxillary longer than the eye. 

 Upper jaw with a single series of about twenty closely-set, short, 

 incisor-Hke teeth on the bHnd side, the series of the other side being 

 rudimentary. Eyes separated by a narrow smooth bony ridge, their 

 front margins being on the same level. The dorsal commences imme- 

 diately behind the front margin of the eye, and its distance from the 

 caudal is less than the depth of the free portion of the taU. The 

 dorsal rays about the thirty-second are the longest, equal in length 

 to the pectoral and half as long as the head ; ventral not much shorter 

 than the pectoral ; a spine before the anal, Gill-rakers widely set, 

 pointed, half as long as the eye. Uniform brownish-grey. 



Arctic seas of America. 



a. Adult. Arctic Expedition. From Dr. Rae's Collection. 

 6. Adult. From the Haslar Collection. 



5. Pleuronectes dvinensis. 



Platessa dvinensis, Lilljeh. Vet. Akad. Handl. 1850, p. 360. tab. 20 ; 

 Nilss, Skand. Faun. iv. p. 617. 



D. 50-57. A. 36-41. 



The height of the body is contained twice and two -thirds in the 

 total length (with the caudal), the length of the head four times and 

 one-third, the length of the caudal fin six tiroes. Scales minute, 

 scattqped, with the posterior margin ciliated ; spiny tubercles none ; 

 the blind side entirely smooth. Cleft of the mouth small, with the 

 lower jaw prominent. Each jaw with a series of closely-set incisor- 

 like teeth. Eyes separated by a prominent acute ridge, which is 



