126 CATALOG or FOSSIL FISHES IN THE MUSEUM 



E 1864 Fragmentary spine-shaped plate, tuberculated on the edges. 

 Collected by W. L. Bryant. 



E 2460 Fragmentary plate, in matrix, ornamented with flattened, 

 non-stella;te tubercles; perhaps this species (PI. 43, fig. i). 



E 2461 Pointed dental (?) plate in oral view (PI. 42, fig. 2). The side 

 walls are ornamented with tubercles, and underneath is a 

 broad cavity extending the entire length of the specimen. 

 Collected by W. L. Bryant. 



E 2463 Spine-like plate resembling a specimen figured by J. W. 

 Davis, from Armagh, Ireland {Trans. Royal Dublin Soc, 

 [2], I, pi. 62, fig. 13). 



E 2464 Fragmentary plate, probably portion of a dental plate, in 

 matrix. Near one extremity are a few obscure denticles. 



E 2466, E 2467 and E 1868 Three elongated, spine-like plates 

 closely resembling a specimen figured by J. W. Davis 

 (Ibid., pi. 65, figs. 3, 4), excepting that our specimens 

 apparently terminated distally in a conical point. 



E 2468 An imperfect, triangular, spine-like element, suggestive of 

 an Oracanthus spine. (PI. 43, fig. 3.) 



E 2469 Fragmentary spine-like plate seen in longitudinal section. 



E 2493 Sigmoidally flexed plate shaped like an upper dental of 

 Ptyctodus, the beak compressed and rounded, and behind 

 it a cutting margin expanding posteriorly into a tritor- 

 like area. Under surface excavated as a pulp cavity. 

 (PI. 43, fig. 2.) 



Ptyctodontidae indet. 



E 2472 Fragmentary dental plate, in matrix, showing a pronounced 

 anterior beak, and a secondary acute cusp a short dis- 

 tance behind it; the latter separated from the beak by a 

 deep, semi-circular excavation. 



Conodont bed (Genesee) ; Eighteen Mile Creek, North 

 Evans, Erie County, N. Y. CoUected by W. L. Bryant. 



E 2473 Another specimen similar to preceding. 



