30 PROCEEDINGS OF THE NATIONAL MUSEUM vur.. 68 



cusp. Base of the main cusp considerably narrower and set a little 

 lower with respect to the top or the lar and at once turns upward. 

 in specimens of the same size, the posterior bar is wide. The an- 

 terior downward projection bends further posteriorly, making less 

 of a right angle with tlie bar while in E. deflecta this angle is 5 to 10 

 degrees more than a right angle. zVlso the whole posterior part of 

 the bar is slightly but distinctly arcuate. 



OcGun-'ence. — Devonian (Rhinestreet) : Shaleton, N. A'. 



Cotypes.—Cfit. No. 11274, U.S.N.M. 



EUPRIONIODINA PERANGULATA, new species 



Plato 3, fig. 10 



Tooth developed almost equilaterally as in Ilibhardella but when 

 carefully examined it is found that the two lateral extensions are 

 not equal the anterior one being the longer of the two and carrying 

 six short, blunt (possibly evenly broken) closely spaced denticles 

 whereas the other end of the bar carries four with a minute one be- 

 tween the first and the second, much longer, well separated straight 

 •[lOnticles. Mon^over tlie main cus[) is very slightly curved. All of 

 these characters suggest Ewprioniodina and compared with other 

 species of this genus this one is readily recognized by its sharp 

 angulation and the reversal in length of the lateral extensions of 

 the bar. 



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



H oloty pes.— C?ii. No. 112T5, U.S.N.M. 



EUPRIONIODINA PECULIARIS. new species 



Plate 10, fig 3 



Founded upon a single practically complete specimen showing 

 the inner side of tooth. It consists of a rather thin, basally exca- 

 vated, strongly bent plate carrying on the upj^er surface of the 

 posterior half a series of strong bluntly tapering denticles all more 

 or less backwardly inclined and terminating near the middle of tlie 

 whole tooth in a cusp which is much larger than the others. In 

 front of this is a space without denticles and then a series of about 

 seven denticles much smaller than those on the posterior lialf. 



Occurrence. — JMississii)pian (Hardin sandstone) : Mount PleasanI, 

 Tenn. 



Holotype.—Q'nt. No. 11017, U.S.N.M. 



LONCHODINA, new genus 



Like EupHoniodina but ends of bar more equal in length and the 

 entire bar strongly bowed, bent in two directions one with the usual 

 upward curvature at the middle and the othei- outwardly as seen in 



