394 FOSSIL FISH. 



anal fins, the latter of which is pretty long, and has from ten 

 to twelve radii. M. de Blainville has named this species 

 C. Scheuchzeri. At first he took it for a carp, but finally 

 referred it to Clupaea. 



Another species attached by the same author to this genus 

 is that named by him C. elongata. This was a fine ichthyolite 

 from the same locality, and figured by Knorr. The impres- 

 sion offers nothing but mere traces of the pectoral fins. The 

 pelvian seem thrown very far back under the abdomen, which 

 is very long. The dorsal fin, on the contrary, appears to have 

 been considerably in front of the pelvian, and therefore not at 

 all opposite to the anal. The tail is terminated by a fin deeply 

 bifurcated, and each bifurcation is rather pointed. The head, 

 though disfigured, appears to have been elongated, and the 

 body very evidently so. The number of vertebrae is forty, and 

 the ribs are slender and very numerous. This ichthyolite has 

 much of the pike form, though M. de Blainville refers it to the 

 herring. 



A third species is C. megaptera, De Blainville. The body 

 is much shorter in proportion than the preceding. The ver- 

 tebrae are very numerous, and diminish gradually in length 

 from head to tail. The abdominal cavity is pretty large. The 

 head is much disfigured, and unsatisfactory in its indications. 

 The pectoral fins, very long, and probably narrow, are attached 

 very low. The pelvian are rather small, and situated a little 

 behind the moiety of the trunk. The dorsal has eight or nine 

 radii ; the first of which, very short, and the second longer, are 

 simple, while the following five have, at their extremity, a sort 

 of divided ray. The anal fin is very far back, rather low, and 

 formed of eight or ten gradually diminishing radii. The tail 

 is deeply notched, and terminated by a fin of eighteen radii. 



4. Zeus. To this genus are referred Zeus Regleysianus, 

 De Blain. An impression evidently formed by the skeleton of 

 a spinous and probably a thoracic fish. It is with doubt, 

 however, that M. de Blainville speaks of the genus of this 



