AKT. 12 CLASSIFICATION OF CONODONTS ULRICEI AND BASSLER 35 



loniT cylindrical sli<rlitl3' flattened at the rapidly taperinji; extremity. 

 Six to nine denticles on the lon<2:er end of bar and usually four on 

 the shorter, cylindrical antl theis" bases separated by fidly their own 

 diameter. The relative straightness of the bar readily characterizes 

 this species which in no other respects is much like L. perlonrjn 

 although the denticles are shorter throu<jhout. 



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



Cotypes.—Q'Ai. No. 11289, U S.N.M. 



LONCHODINA AI.TERNATA. new species 

 Plate G. fiir. 4 



Similar in angulation of the bar to Z. nrcuata and L. subangu- 

 lata but readily distin<jfuished from both of them by the very un- 

 ecfual, alternatinir size of the denticles on the posterior part. Thei'c 

 are minor differences in the trend of the curvature of the main cusj) 

 and other points which are brou<rht out in the illustration. 



Occurrence. — DeA'onian (Rhinestreet) : Shaleton, N. Y. 



TIolotiipe.—Q'2ii. No. 11290. U.S N.M. 



LONCHODINA? INCREBESCENS. new species 



Plate 5. ivx. 20 : Plate 3. fit;s. 15. 10 



Tooth stroriirly bowed outv;ard but the distinct separation of the 

 main cusp and its strong denticulated dow-nward projection (an- 

 teri-'ir end of bar) su«i:<j:ests Eiipyioniodina.. The very considerable 

 strenjrth of the denticles on both ends of the bar decided the \)Vo- 

 visional placement under Lonchodhm. On account of the bowed 

 form the tooth is usually broken but unless broken so that the two 

 ends of bar separate and lie more nearly in a plane than natural 

 the denticles of the anteri(n- end are not visible in a view of the 

 convex side. 



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



Gotypes.—i'-Ai. Xo. 11291, U.S.N.M. 



LONCHODINA? PROJECTA, new species 

 Plate 5, figs. 9, 10 



The main cusp and anterior set of denticles are similar to L. 

 suhangulata except tliat all of the denticles ar.^ relatively larger and 

 somewhat farther apart and the main cusp is flatter Avith a sugges- 

 tion of sharp edges. The main difference lies in the uncommon 

 brevity of the posterior end which is about half as long as the 

 anterior and carries only two or three subequal denticl s. 



Occurrence. — Devonian (Rhinesti-eet) : Shaleton, N. Y. 



Cotvpes.—C^t. No. 11292. U.S.N.M. 



