FOSSIL FISH. 397 



inches long. The lobe of the tail is very sharp. A fossil of 

 the black schists of Autun. 



P. parvum, De Blain. Many relations with P. magnum^ 

 but the head is much less thick, 



3. Herring (^Clupcea), C, Lametheriit De Blain. The 

 deep bifurcation of the tail of this ichthyolite determined 

 M. de Blainville to refer it to clupsea. The pectoral members 

 are terminated by a iin of eighteen rays. The pelvian are 

 extremely small, and have but five ; the dorsal has about 

 fifteen, and the anal ten or twelve. 



4. Pike {Esox). E, Eislebensis. Another species, also 

 abdominal. The lower fins are disposed as in the preceding, 

 but it is much larger, being sometimes twenty-seven, and 

 never less than eighteen inches long. The dorsal fin, more- 

 over, is exactly opposed to the anal, which constitutes it a 

 pike. 



5. Stromateus. aS*. major, De Blain. In Hesse, a fossil 

 fish has been found, exhibiting much analogy with Zeus or 

 Chcetodon. It is referred by M. de Blainville to this genus, 



S. gibbosus is the rhombus minor of Scheuchzer, and dis- 

 tinguished by M. de Blainville from the preceding. The form 

 is greatly elevated and compressed ; there are traces of a very 

 large head, an operculum very marked and open, but no traces 

 of pectoral fins. The caudal fin is deeply bifurcated. 



S. hexagonus. A fine impression, figured by Knorr. The 

 dorsal line is convex as well as the ventral. The head is 

 moderate. 



Many other remains are found in the same localities as the 

 preceding, but nothing determinate has been concluded con- 

 cerning them. 



Among the ichthyolites of the compact limestone come the 

 following species : — 



In France, Elops macropterus, De Blainville. At Gram- 

 mont, four leagues from Beaune in Burgundy, was found an 

 ichthyolite, thus named by M. de Blainville, It projects from 



