454 PLEURONECTID^. 



21. Pleuronectes umbrosus. 



Platichthys lunbrosus, Girard in Proc. Acad. Nat. Sc. Philad. 1856, 

 p. 136, and in U. S. Pacif. R. R. Uxjjed. Fishes, p. 149. 



D. 70. A. 53. L. lat. 80. 



The height of the body is two-fifths of the total length (without 

 caudal), the length of the head two-sevenths. The greatest depth 

 between the anal fin and the straight portion of the lateral hne is 

 somewhat less than the length of the head. Scales small, those on 

 the middle of the side with the marginal portion covered with spines ; 

 head entirely covered with small, spiny, not imbricate scales ; snout 

 naked ; the bUnd side smooth, no spines along the base of the dorsal 

 and anal fins ; lateral line smooth, with a strong curve above the 

 pectoral, the depth of the curve being one-thii-d of its width. Snout 

 shorter than the eye, the diameter of which is two-ninths of the 

 length of the head. Lower jaw prominent, maxillary as long as the 

 eye. Upper jaw with a single series of about sixteen conical, 

 closely-set teeth on the blind side, those of the other side being 

 smaller and less in number. Eyes separated by a very narrow 

 bridge, covered with small tubercles ; the lower eye is scarcely in 

 advance of the other. The dorsal commences immediately behind 

 the anterior margin of the eye, and its distance from the caudal is 

 one-half of the depth of the free portion of the tail. The dorsal rays 

 about the fortieth are the longest, equal in length to the pectoral 

 and half as long as the head. No spine before the anal. Uniform 

 dark brown. 



Pacific coasts of North America. 

 a-c. Adult and half-grown : skins. Esquimault Harboiu', Vancouver 

 Islands. Presented by Earl Russell. 



22. Pleuronectes asper. 



Pallas, Zoogr. Ross.- As. iii. p. 425. 



D. 67. A. 48. 



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

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

 a half. Each scale terminates in a small recurved spine ; lateral 

 line smooth, with a strong curve above the pectoral. The lower jaw 

 is the longer ; each jaw with a single series of obtuse cUstant teeth. 

 Dorsal and anal rays provided with small spines. Brownish-olive. 

 {Pall.) 



Coasts of eastern Siberia. 



18. PAROPHRYS. 



Pleuronichthys, pt., et Parophry.s, Girard, Proc. Acad. Nat. Sc. Philad. 



1854, pp. 139, 140. 

 Heteroprosopon, Bleek. Compt. Rend. Acad. Sc. Amsterd. 1862, xiii. 



Pleuron. p. 8. 



Cleft of the mouth narrow ; teeth minute ; scarcely any teeth on 



