ART. 12 CLASSIFICATION OF CONODONTS ULRICH AND BASSLEE 25 



series of denticles relatively smaller, the disproportion in size being 

 especially apparent in those close to the base of the main cusp. It 

 differs from the other two mentioned in the straightness and some- 

 what broader base of the main cusp. 



Occurrence. — Devonian (Rhinestreet) : Shaleton, N. Y. 



Cotypes.—C^t. No. 11269, U.S.N.M. 



BRYANTODUS COALESCENS, new species 



Plate 4, fig. 28 



Distinguished from all others by the merging of four or five 

 denticles adjacnt to the main cusp so that it gives the appearance 

 of an enormously broad, rapidly tapering triangular main cusp. 

 The base is rather strongly curved, especially at the outer extremity 

 of the long end which is also uncommonly long as compared to the 

 posterior part. The latter carries three or four slightly projecting, 

 posteriorly diminishing, coalescent denticles. In the anterior end 

 th.re are five thick anteriorly diminishing denticles beyond those 

 merged into the base of the main cusp, the first being the largest. 



Occurrence. — Devonian (Rhinestreet) : Shaleton, N. Y. 



Holotype.—Q^t. No. 11270, U.S.N.M. 



BRYANTODUS INSOLENS. new species 

 Plate 10, fig. 17 



Tooth rather slender, the shorter end incurved and its extremity 

 rounded upward, wdth the median cusp large, prominent, and 

 truncated bluntlj^, with 5 or 6 denticles on one side (anterior) and 

 12 or more on the other, all denticles closely arranged. 



This new species is similar to B. nelsoni and with it forms a sec- 

 tion of the genus that in the shape of its anterior end has a re- 

 semblance to Hindeoclella. 



Occurrence. — Mississippian (Hardin sandstone) : Mount Pleasant, 

 Tenn. 



Holotype.—Q^X. No. 11015, U.S.N.M. 



BRYANTODUS GERMANUS, new species 



Plate 10, fig. 18 



Related to B. subradiatus but with a more expanded base, having 

 small wart-like elevations on its upper surface. The denticulated 

 part is distinguished by the spatulate form of the main cusp and the 

 great inequality in the denticles on opposite sides of it. 



Occurrence. — Mississippian (Hardin sandston(>) : Mount Pleasant, 

 Tenn. 



Holotype.—C^it. No. IIOIG U.S.N.M. 



60728—26 4 



