ART. 12 CLASSIFICATION OF CONODONTS ULRICH AND BASSLER 41 



HINDEODELLA SUBEQUALIS, new species 



Plate 4, fig. 21 



This species suggests a departure from the typical species of 

 the genus towards Eupnoniodina. This is indicated by the close 

 nonalternating arrangement of the denticles and their more robust 

 character. The anterior end is not sharply deflected as it should be 

 in that genus but retains the essential features of Hindeodella though 

 in subdued degree. 



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



Holotype.— Cut No. 11301, U.S.N.M. 



DIPLODODELLA, new genus 



Bilaterally symmetrical as in TUhhardella but denticles are fused 

 and have minutely bifurcated terminations. The base also is rela- 

 tively thicker and the sharp-edged major cusp smaller and shorter. 



Genotype. — DipJododeUa hilaferalis, new species. Early Missis- 

 sippian. 



DIPLODODELLA BILATERALIS. new species 



Text fig. 21 (p. 16) 



Specific characters as in the above diagnosis and as shown in 

 figure 21. 



Occurrence. — Mississippian (Chattanooga shale) : 13 miles east 

 of north of Huntsville, Ala. 



Holotype.—Q^t. No. 11306, U.S.N.M. 



PALMATODELLA, new genus 



Though essentially like Prioniodina the general aspect is very 

 different, the bar or posterior half being straighter, much longer 

 and slender like a hirsute spine, the anterior end longer, triangular 

 in outline, much wider than the posterior and bent at right angles 

 to it and all denticles much finer, hairlike, sharply directed forward 

 and for the most part fused. 



Genotype. — PalmatodcUa delicatula, new species. Early Missis- 

 sippian. 



PALMATODELLA DELICATULA, new species 



Text fig. 20 (p. IG) ; Plate 10, p. 5 



The strikingly palmlike aspect of the species makes it easily 

 recognized. Other features of the species are given in the generic 

 diagnosis. 



Occurrence. — Mississippian (Chattanooga shale) : 13 miles east of 

 north of Huntsville. Ala. 



n olotype. —C?it. No. 11307, U.S.N.M. 



