456 PLETJBONECTID^. 



3. Parophrys quadrituberculata. 



Pleuronectes quadrituberciilatus, Pallas, Zoogr. Ross.-As. iii. p. 423. 



D. 70. A. 51. 



Teeth ? 



The height of the body is contained twice and four-fifths in the 

 total length (with the caudal). Head with a series of four bony, 

 conical, obtuse, and very prominent tubercles, continuous with the 

 lateral line : two of these tubercles are approximate and situated an- 

 teriorly, the third at the hinder margin of the upper orbit ; the fourth 

 is the largest, and situated above the opcrcle. Lateral line scarcely 

 bent anteriorly. Body smooth, with the scales rudimentary. Anal 

 distant from ventrals. Anal spine hidden. (Pall.) 



Sea between Kamtschatka and America. 



4. Parophrys ccenosa. 



Pleuronichthys coenosus, Girard in Proc. Acad. Nat. Sc. Philad. 1864, 

 p. 139, and in U. S. Pacif. R. R. Exped. Fish. p. 151. 



D. 74. A. 54. 



The length of the head is two-elevenths of the total length, that 

 of the caudal a little less than one-fourth. Snout very short ; mouth 

 small, the lower jaw longest. Teeth inconspicuous on both sides. 

 Eyes separated by a narrow ridge, their diameter being one-third of 

 the length of the head. The dorsal fin commences opposite the an- 

 terior margin of the orbit, is elevated towards its posterior third, and 

 terminates at a short distance from the caudal. Scales small, entire 

 and smooth ; lateral line with a slight curve above the pectoral. 

 Deep-brown, spotted with blackish and yellowish. {Qir.) 



San Francisco. 



5. Parophrys ayresii. 



D. 66. A. 47. 



The height of the body is rather more than one-half of the total 

 length (with the caudal), the length of the head rather more than one- 

 fifth, the length of the caudal less than one-fifth. Snout very short ; 

 mouth small, with the lower jaw longest, and with the maxiUary 

 extending beyond the front margin of the eye. Jaws with a broad 

 band of villiform teeth on the blind side, and with a few on the 

 coloured one. Eyes separated by a very narrow, elevated, smooth 

 ridge ; the lower eye slightly in advance of the upper ; the diameter 

 of the eye is one-fifth of the length of the head. Cheeks and opercles 

 covered with minute scales. The dorsal fin commences somewhat 

 before the middle of the eye, and is highest near the thirtieth ray, 

 the length of which is rather more than one-half of that of the head. 

 The distance between the dorsal and caudal is about one-third of the 

 depth of the free portion of the tail. Anal spine prominent. The 

 length of the pectoral cfjuala the distance of the lower eye from the 

 end of the operculum,. Ventral about half as long as the pectoral, 



