BUFFALO SOCIETY OF NATURAL SCIENCES 195 



Microdon elegans Agassiz 



E 2159 Cast of a fish, showing all the fins. 



Upper Jurassic; Kelheim, Bavaria. 



Family ASPIDORHYNCHID^ 



Aspidorhynchus acutirostris (Blainville) 



E 2567 Fish lacking head and caudal extremity. Length as far as 

 preserved, 40 cm.; greatest depth of body, 6.5. 



Lithographic slate (Upper Jurassic); Solnhofen, 

 Bavaria. 



E 2 1 58 Cast of a fish, shown in side view. 



Lithographic slate (Upper Jurassic); Eichstadt, 

 Bavaria. 



Family LEPISOSTEID^ 



Lepisosteus simplex Leidy 



(PL 68) 



Although a dozen species of fossil gar pikes have been named from 

 various localities in North America, ^^ only three are known by com- 

 plete fishes; the others are represented by vertebrae, scales or head 

 plates, and are not satisfactorily defined. The species represented by 

 whole fishes are: 



1. Lepisosteus atrox Leidy — Green River shales (Eocene), Wyo. 



2. Lepisosteus simplex Leidy — Green River shales (Eocene), Wyo. 



3. Lepisosteus (Clastes) cuneatus (Cope) — Miocene, Utah. 



Of these, the best represented species is L. simplex, known by at 

 least three splendid specimens — one in the United States National 

 Museum, ^^ a second from the Eocene of Utah,*^ and a third, un- 

 described, in the American Museum. To these three we may now 

 add a fourth specimen — a splendid fish which even surpasses the 

 preceding ones in size, preserved in the Buffalo Museum. It is from 

 the type locality, the Green River shales of Wyoming. We base the 

 identification of the species chiefly on the character of the fins, which 



" Hay, Bibliography and catalog fos. Vert- N. Amer., p. 377. 



"Eastman, C. R.: Fossil Lepidosteids from the Green River Shales of Wyoming. Bull. Camp. 

 Zool. xxxvi, 74, pi. i, fig. i, igoo. 



" Briefly described by Prof. T. D. A. Cockerell in Science, n. s., xxix, 796, igog. 



