172 UPENLUS, &C. 



the prince of Musignano, other two are added. 

 They all inhabit the Mediterranean Sea. 



Upeneus, Cuvier. Distinguished from the last 

 by having teeth on both jaws, a spine on the oper- 

 cuJum, and furnished with an air bladder; the 

 second dorsal fin is more ample and spreading. 

 These are again divided into subordinate groups, 

 the one having a narrow band of fine teeth upon 

 each jaw, the other having a single row of separate 

 conical teeth on each. They are natives of the 

 Indian and American Seas. 



Having thus exhibited, as far as we now can, 

 the arrangement which MM. Cuvier and Valen- 

 ciennes propose in the Percoid fishes, their first 

 family, we may remark, that it forms a portion of 

 the third order of the new system of Agassiz, the 

 Ctnenoides. Several fossil forms have been dis- 

 covered, some of which have been identified with 

 the genera now existing, while others can be 

 referred to no form which is at present known to 

 ichthyologists. Here it would be impossible to 

 enter into the details of this interesting part of 

 the science, and we simply give an example of 

 each, from the beautiful lithographic plates of 

 Agassiz Poissons Fossils, which will illus- 

 trate the situation in which the parts of fishes 

 have been preserved ; and thence the difficulty 



