423. 



Far. ? 



BIACULEATED TRUNK-FISH. 



Ostracion Biaculeatus. 0. trigonus, spinis svhcaudalibus diiabus, 



pinna dorsali radiis decern. Lin, Syst. Nat* 

 Triangular-bodied Trunk-Fish, with two subcaudal spines, and 



ten rays in the dorsal fin. 

 Ostracion bicaudalis. O. triangularis, maculosus, aculeis hinis 



subcaudalibus. Block, t. 132, 



This, in all probability, is either a variety, or a 

 sexual difference, of the former fish, from which it 

 differs in being marked ail over with numerous 

 small black spots, and in having the spines smooth 

 or not channeled as in the former fish. It is a 

 native of the Indian seas. 



HORNED TRUNK-FISH. 



Ostracion Cornutus. 0. tetragonus, spinis front alihus subcau- 



dalibusque hinis. Lin. Syst. Nat. 

 Quadrangular-bodied Trunk-Fish, with two frontal and two 



subcaudal spines. 

 Ostracion quadrangularis, spinis quatuor. Block, t. 133. 



Length eight or ten inches : shape squarish ; 

 broad and abrupt towards the head, and tapering 

 considerably towards the hind part : back nearly 

 strait : crust or mail strongly marked into large 

 hexagons : from the top of the head project two 

 strong, lengthened, sharp spines pointing strait for- 

 wards 3 and on each side the anal fin is a similar 



