420 FOSSIL FISH. 



of the anal, proceed, gradually diminishing, from the first to 

 the last. 



C. lineatus, Icht. Ver. The general form of this fossil fish 

 indicates a species very much approximating to lineatus; but, 

 as the head is entirely wanting, it would be too much to pro- 

 nounce decisively on its identity. 



C. canus, Icht. Ver. A small species, pretty like the pre- 

 ceding, that is, considerably elongated ; but it differs a little 

 in the form of the fins, and especially in that of the anal. 



C. triostegusj Volta. There is really some analogy between 

 this fossil and the living species, in the general form of the 

 body, and especially in the declivity of the front-head. But 

 the anal fin is strikingly longer in the living animal ; and pro- 

 bably there is some difference in the proportion of the spinous 

 rays of the dorsal : the body is also more elevated. 



C. rostratus, Icht. Ver. A specimen far too much dete- 

 riorated to attempt any approximation between it and living 

 species. 



C. orbis, Icht. Ver. Very imperfect ; but there is quite 

 enough to prove the non-affinity to orbis. 



C. subaureusy De Blain. ; C. aureus, Volta. There is, 

 without doubt, some approximation in this fossil skeleton, 

 which is well preserved, and the figure of which is very good, 

 to the C. aureus ; but the differences are still more apparent, 

 and prove that the fossil belonged to a distinct species. The 

 head of the latter is much larger, and has a totally different 

 form ; the dorsal fin commences much less in front, and the 

 first radii are the longest, as is also the case with the anal; 

 neither do they reach to the tail, whereas they pass it consider- 

 ably in aureus. The form, too, of these fins is not the same. 

 The Zeus gallus of Volta indubitably belongs to the same 

 species as this fossil. 



C. papilio, Volta. This species, which Volta has not found 

 to approximate to any hving species, is effectively distinct 

 from all hitherto known. The body is very much raised, and 



