280 tlVMNODONTEs, 



the dorsal fin. Caudal fiu subtruncato. The osseous intcrorbital 

 space very broad, much broader than the orbit. Each upi)cr tooth 

 with a groove and ridge near the median line. A more or less dis- 

 tinct light ring round the root of the dorsal fin, less conspicuous in 

 adult than young specimens. Upper parts brown ; in young ex- 

 amples light bands cross the back, and run backwards along each 

 side of the back. The lateral bands are frequently persistent (xan- 

 thopterus) ; but sometimes they disappear, the upper part of the side 

 being spotted with black, one large spot above the end of the pec- 

 toral (which is also sometimes visible in the variety xanthopterus) 

 being the most conspicuous (rubripes). 

 Japan and China. 



Var. «i. ruhrijpes. 



a-b. Adult (19 inches) : stuffed. Japan. Two of the types of 

 T. ruhnpes. 



Var. ft. xanthopterus. 



c. Adult (15 inches): stuffed. Japan. One of the types of T. xan- 



thopterus. 



d. Adult. Japan. Purchased of Mr. J amrach. 



e. f. Half-grown and young. China. From the Collection of the 



East-India Company. 

 g. Young. China. From the Collection of the Zoological Society. 



11. Tetrodon hamiltonii, 



Tetrodon hauiiltoni, Richards. Ichth. Ercb. ^- Ten: p. G3, pi. 39. 

 figs. 10 & 11. 



The back and abdomen are covered with minute spin' -s ; howover, 

 frequently nothing is visible of the spines, except the pores in which 

 they are lodged, and then the entire fish is smooth to the touch ; and 

 there are specimens which are evidently entirely spineless. Snout 

 short, only one-half longer than the eye, and equal to the width of 

 the osseous intcrorbital space. The length of the head is less than 

 its distance from the dorsal fin. Caudal fin rounded. Lower lateral 

 fold distinct. Upper parts brown, with numerous close round black 

 spots ; cheeks with some brown vertical bands or spots ; some large 

 dark blotches on the sides ; sometimes an indistinct dark band across 

 the back. Lower parts white. 



Port Jackson. 



a-b,c-e. Adult and half-grown. Port Jackson. From the Hjslar 



Collection. — Types of the sjjecies. 

 /, r, h-k. Adult (5| inches), half-grown, and young. Port Jackson. 



12. Tetrodon vermicularis. 



Krusenstern, Iteise, Atlan, pi. 51. fig. 1. 



Tetraodon vcrniicidarisi, Schlei/. Faiin. Japuit. I'oi.ts. p. 'JTf^, pi. \~\ 



("asti'ophvfiis vt'1'iuii.iilaris, lllici. ] rrh. Bui. d'cii. x.w. Jd/xm. p. 12.). 



