OSTRACION. TRUNK-FISH. 



Generic Character, 



Denies porrecti, teretes, ob- Teeth pointing forwards, 

 tusiusculi. cylindric, rather blunt. 



Corpus osse integro lorica- Boch/ mailed by a bony 

 turn, covering. 



TRIQUETRAL TRUNK-FISH. 



Ostracion Triqueter. 0, trigonus, muticus. Lin, Syst, Nat, 

 V- 407. 



Triangular-bodied, unarmed Trunk-Fish. 

 Ostracion triangularis muticus^ tessulis conyexis. Block, t, 

 330. 



T^HE Gstracions or Trunk-Fishes are so strik- 

 ingly distinguished by their bony crust or covering, 

 that no difficulty can arise to the ichthyological 

 student in referring them to their proper genus. 

 The investigation of the species however demands 

 a greater degree of attention, and such is the simi- 

 larity between some of these, that it remains doubt- 

 ful whether they should be considered as truly dis- 

 tinct, or as constituting mere sexual differences. 



The triquetral Trunk-Fish measures about twelve 

 inches in length, and is, as its name import^ of a 

 trigonal shape, the sides sloping obliquely from 



