422- 



TRIGONAL TRUNK-FISH. 



Ostracion Trigonus. 0. trigoms, spinis suhcaudalibus duahus, 

 pinna dorsali radiis quatuordecim. Lin. Syst. Nat. 



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

 fourteen rays in the dorsal fin. 



Ostracion dorso arcuato^ pinna anali radiis duodecim. BlocJi, 

 t. 135. 



Much allied to the preceding in general appear- 

 ance, but with the back more convex or of a rounder 

 outline when viewed in profile : shield divided, as 

 in the former species, into large hexagonal arete, 

 but marked with numerous small tubercles rather 

 than streaks : towards the extremity of the body, a 

 little before the anal fin, on each side the abdomen^ 

 a very strong, sharp-pointed, slightly curved and 

 striated spine, directed towards the tail, which, as 

 well as the fins, is shaped as in the preceding fish : 

 the colour is a pale ferruginous brown, with pale 

 or whitish fins. Native of the Indian seas : said to 

 make a kind of grunting noise when first taken, 

 owing to the sudden expulsion of air from its 

 branchial orifices. 



