20. HEMITKIPTEEUS. 143 



19. TEICHOPLEURA. 



Sthenopus*, Richards. Voy. Samar. Fishes, p. 10. 

 Tnchoplem-a, Km(2), Wiegtn. Arch. 1858, p. 338. 



Head and body compressed, naked ; the former without spines or 

 protuberances. The three anterior dorsal spines fonning a separate 

 division of the fin ; the remainder of the fin continuous, with ten 

 spines; pectoral appendages none; aU the rays of the fins simple, 

 leeth m the jaws and on the vomer, none on the palatine bones, 

 bix branchiostegals ; no cleft behind the fourth gill. 



Sea of China. 



1. Trichopleura moUis. 

 Sthenopus mollis, Richards. Voy. Samar. Fishes, p. 10. pi. 2. f. 6 7. 

 B. 6. D. 3 I 1 1 1. A. 10. V. 1/2. 



Integuments soft, lax, with scattered minute filaments and prickles 

 Ihe first three dorsal spines forming a separate division of the fin • 

 the foui-th spine intermechate, and at some distance from the pre- 

 ceding and the foUowing spines. Head without external ridges and 

 protuberances. 



Sea of China. 



a. Adult. China. Presented by Sir J. Richardson.— Type of the 

 species. 



20. HEMITRIPTEEUS. 



Hemitripterus, Cuv. 8,- Val. iv. p. 268. 



Head not compressed, naked, \dih. many cutaneous appendages • 

 armed. Scales none. Two dorsals, the first rather more developed 

 than the second ; ventrals enveloped in thick skin hke the pectorals • 

 no pectoral appendage. ViUiform teeth in both the jaws, on the 

 vomer, the palatine and pterygoid bones. Six branchiostegals. Aii-- 

 bladder none ; pyloric appendages in moderate number. 



Atlantic shores of Northern America, 



1. Hemitripterus americanus. 



Cottus acadianus, Penn. Arct. Zool. iii. p. 371. 



tripterygius, Bl. Schn. p. 63. 



hispidiis, Bl. Schn. p. 63. pi. 13 (bad). 



Scoi-psena flava, Mitch. Trans. Lit. ^ Philos. Soc. New York i n 38'> 

 pi. 2. f. 8. ; • i- • 



piu-pm-ea et rufa, Mitch. Amer. Month. Mag. ii. p. 245 



Hemitiipterus americanus, Cm. ^ Val. iv. p. 268. pi. 84 ; Griff. Anim 

 Kimjd. X. p. 141. pi. .53. f. 3«; Storer, Rep. Mass. p. 23 ; Dekay 

 Aew York Fauna, Fishes, p. 56. pi. 6. f. 16; Cuv. Reane Anim. III. 

 Roiss. pi. 22. f. 1. 



D. 1.5 I 12. A. 14. Cffic. pylor. 6. Yert. |. 



The anterior portion of the first dorsal rather remote from the 



* Preoccupied. 



