ART. 12 CLASSIFICATION OF CONODONTS ULRICH AND BASSLER 29 



EUPRIONIODINA, new genus 



Like PHonodina but main cusp much more produced and interior 

 part of bar, smaller, shorter, more sharply deflected and carrying on 

 its upper edge a series of closely arranged denticles. 



Genotype. — E. deflecta., new species. 



Range. — Upper Devonian, Mississippian. 



Because of the denticulated anterior part of the bar this genus 

 falls in the Prioniodinidae but the general aspect is that of a Prioni- 

 odus with the downward projection of the main cusp bearing 

 denticles. If not properly prepared, specimens are liable to be con- 

 fused with Prioniodus. Prioniodus acicularis, P. furcatus^ and P. 

 radicans Hinde, 1879, P. cdatus^ and P. discedens Hadding, 1913, and 

 P. Janceolatus and P. curvatus Smith, 1907, appear to belong to this 

 genus judging from their illustrations. 



EUPRIONIODINA DEFLECTA, now species 



Plate 3, figs. 11, 12 



Tooth with the main cusp and posterior extension of bar having 

 the general aspect of Prioniodiis but the anterior downward projec- 

 tion is not simple, as it carries three or four small denticles. Main 

 cusp slightly curved posteriorily, although on the whole inclining 

 forward. Posterior extension of bar with eight somewhat unequal 

 but fairly stout denticles, the largest of Avhich may be approximately 

 half the length of the main cusp. Downward projection of bar 

 about rectangular to the axis of the bar and about half as long. 



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



Cotyjjes.—C&i. No. 11272, N.S.N.M. 



EUPRIONIODINA CONFERTA, new species 



Plate 3, fig. 17 



Distinguished by the considerable width, unusual flatness, sharp 

 edges and decided anterior curving of the main cusp and the more 

 closely arranged posterior lateral denticles which are twelve in num- 

 ber. Anterior denticles three, small and short. The downward ex- 

 tension is relatively small and directed somewhat anteriorly making 

 an angle of about 110 degrees. 



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



Holotype.—C2it. No. 11273, U.S.N.M. 



EUPRIONIODINA BRYANTI, new species 

 Plate 3, figs. 13, 14; Plate 1, fig. 21 



Similar to E. deflecta but both main cusp and denticles are on 

 the whole more slender, farther apart and the largest of the latter 

 relatively longer reaching almost two thirds the length of the main 



