DEVONIC FISHES OF THE NEW YORK FORMATIONS 63 



Cladodus coniger Hay 



1889 Cladodus carinatus /. S. Newberry. U. S. Geol. Sur. Monogr. 16: 103 

 1899 Cladodus coniger O. P. Hay. Am. Nat. 33: 783 



In the meager description given of this species by Newberry, the teeth 

 are stated to be " less than half an inch in breadth and hight, the base 

 narrow, and bearing one central and four lateral cones, the exterior pair 

 larger than the intermediate ones, but all much lower than the central 

 denticle." The distinctive feature of the species is said to consist in four 

 relatively strong carin2tions on the flattened posterior surface of the 

 principal cone. 



Teeth evidently belonging to this species are by no means uncommon 

 in the Chemung of Warren county, Pennsylvania, but as a rule are imper- 

 fectly preserved. The general form is similar to that of C. c o n c i n n u s 

 Newberry, from the Cleveland shale of Ohio ; and, as in that species, the 

 pair of intermediate denticles is sometimes absent. The external cones 

 also diverge outwards at a considerable angle. The principal cone is 

 strongly compressed, more or less recurved, with sharp lateral edges, and 

 prominently striated on both faces. The number of carinae along the 

 flattened, moderately convex anterior face is not limited to two pairs, how- 

 ever, some specimens displaying twice that number. These are symmet- 

 rically arranged on either side of the median line, the two innermost being 

 nearly vertical and rather more prominent than the rest. 



Formation and locality. Chemung beds (Chautauquan) ; Warren, Pa. 



Cladodus sp. ind. 



A single specimen of Cladodus, associated with other undetermined 



fish remains, is reported by Dr John M. Clarke from the Chemung fauna 



(High Point sandstone) at High Point, a mountain situated about 3 miles 



northwest of the village of Naples, N. Y. [U. S. Geol. Sur. Bui. 16. 1885. 



P- 72] 



Order ACANTHODII 



Two families of Acanthodian fishes are known, one characterized by 

 the presence of a single, the other by two dorsal fins, and both having 



