116 CATALOG OP FOSSIL FISHES IN THE MUSEUM 



Ptyctodus ferox Eastman 



Specimens collected by Mr. E. E. Teller from the Hydraulic Lime- 

 stone, at Milwaukee, Wis. 



E 1890 Complete lower dental plate, somewhat crushed; in matrix. 

 Length, 13 cm.; greatest depth, 6, 



E 2442 Cast of a complete left lower dental plate. Length, 12 cm.; 

 depth at symphysis, 7. Original in Mr. Teller's private 

 collection. 



E 2443 Cast of a complete left upper dental plate 15 cm. in length. 

 The upper dental plates are much more sigmoidally 

 flexed than the lower. Original in Mr. Teller's private 

 collection. 



Rhynchodus excavatus Newberry 



E 1879 Left lower dental plate. 



Hamilton limestone (Mid. Devonic); Milwaukee, 

 Wis. Collected by Mr. E. E. Teller. 



E 1880 Right lower dental plate. Same as preceding. 



E 1881 Right lower dental plate. Same as preceding. 



Rhynchodus telleri, n. sp. 



(Text-fig. 39) 



E 2436 Cotypes. (i) A dental plate lacking the beak, embedded in 

 matrix and shown in outer view. The functional margin 

 is entirely free from matrix. Length 67 mm. ; depth at 

 about middle, 14. 



E 1927 (2) An incomplete dental plate, free of matrix, ^showing the 

 greater portion of the cutting edge. 



Formation and Locality. — Conodont bed (Genesee), Eighteen Mile 

 Creek, near North Evans, Erie County, N. Y. Collected by W. L. 

 Bryant. 



Dental plate relatively slender, its maximum depth about \ the 

 total length. Functional margin a sharp cutting edge with a well- 



