146 SMALL BLACK-SPOTTfiD HYPOSTOMA. 



a long " vivaceousness." It was a female, the roe 

 being double, and occupying one-half of the length 

 of the cavity of the abdomen ; the ova large. No 

 food was found in the stomach ; the intestines form 

 many flexures, but have no appendices. The air- 

 bladder long. Formula of fins given : — 



D. 9_C. 15_A. 4— V. 1/5_P. 1/6. 



The drawing, of the natural size, is in length 

 six and a half inches to the end of lower caudal 

 ray, and is coloured entirely of a dull olive-green, 

 slightly paler beneath, dotted over with small black 

 spots. Tlie eyes red. The cirrhi springing from the 

 angles of the labial disk are represented as ciliated 

 or fringed on one side, and on the nose there ap- 

 pears to be six short barbules, as represented in 

 the annexed cut. The inter-opercular tuft is repre- 

 sented about half an inch in length. The plates on 

 the body are crenate on their edges, and of an angu- 

 lar outline. The lower ray of the tail longest, but 

 the fin or membrane runs straight between the 

 tips, without any junction or curvature. In addi- 

 tion, we possess a specimen of a fourth Hypostoma 

 somewhat allied to the above, but more depressed 

 in form, and in its dried state without any appear- 

 ance of the black dots ; it also agrees in many 

 respects with the H. harhatus^ Yalenc. xv. p. 506, 

 though wanting in the development of having pro- 

 cesses on the head and gill-covers ; it agrees, how- 

 ever in the under parts being without plates or 

 studs of any kind. "W 



