44# DESCRIPTION OF THE MUSEUM. 



tunny (s. thymus), the fishery of which is of 

 great importance to the inhabitants of the Me- 

 diterranean coasts. 3d. The German mackrel 

 (s.germon) found in large shoals in the bay of 

 Biscay : the specimen in the collection was sent 

 from La Rochelle by M. Dorbigny. 4 tn - The 

 carang mackrel (caranx, Lacep.) remarkable for 

 the line strongly mailed on each side of the tail. 

 We have thirty-seven species of them; one of 

 which, the scad mackrel (s. trachurus, Lin.,) in- 

 habits the Mediterranean. 



The vomeres, Cuv. 7 of which there are seven 

 species in the collection from the American and 

 Indian seas, are distinguished by their sharp and 

 elevated forehead, and by the compressed form 

 of their body, which is almost as wide as it is 

 long. M. Guvier has divided them into four sub- 

 genera, according to the form of their fins ; it is 

 to the generally round form of these fish, and 

 to their silvery hue, that they owe the appella- 

 tion of moon-fish. 



Only one species of the genus tetragonurus 7 

 Risso, is known under the vulgar name of sea- 

 crow. M. Risso, who presented it to the Mu- 

 seum, has described and named it t. Cuvieri. 



The genus stickleback {gaslerosteus), compre 1 

 hends the smallest of our fresh water fish ; they 

 are all spiny. One of the two species which in- 



