﻿38G DESCRIPTIONS OP NEW SPECIES OF 



Dimensions. — Length -23 in., width of body whorl "05 in., length of mouth -05 in. 

 Locality. — Caldwell Co. My collection with the next two species. Bare.' 



E. Texana. PL 67, fig. 44. Elongated, more robust than the preceding; whorls 

 eight, slightly rounded, narrow ; surface polished ; suture distinct. 

 Dimensions. — Length *12 in., width of body whorl -03 in., length of mouth -02 in. 



E. tenua. PI. 67, fig. 45. Very elongated and narrow; whorls nine, rounded ; 

 suture distinct; mouth very small, oval. 



Dimensions. — Length "15 in., width of body whorl *0'25 in., length of mouth -02 in. 



DENTALIUM, Lam. 



~~ J D. minutisteiatum. PI. 67, fig. 46. Very slightly curved, marked by numerous 

 small longitudinal ribs, all of the same size, no trace of alternation ; aperture round. 



Dimensions. — Length 1 in., width of aperture - 08 in. 



Locality. — Common at Wheelock. 



DITRUPA. 



D. subcoarcuata. PL o7, fig. 47. Arcuate, widened in advance of the middle; 

 aperture contracted, circular; surface polished. 

 Dimensions.— Length "33 in., greatest diameter *07 in., diameter of aperture -035 in. 

 Locality. Common at Wheelock. 



BULLA, Klein. 



J B. Kellogii. PI. 67, fig. 50. Subcylindrical ; spire hidden ; mouth linear, outer 

 lip straight; umbilicus rudimentary, surface smooth. 



Dimensions'. — Length *14 in., width "07 in. 



Rare, but I have seen it both from Wheelock and Caldwell Co. 



"VOLVULA, A. Adams. 



V. Conradiana. PL 67, fig. 51. Subcylindrical, narrow; apex of body whorl 

 about as high as the width of the lower part of the mouth ; mouth linear, extending 

 the whole length of the shell and slightly wider anteriorly than elsewhere, outer lip 

 nearly straight; inner lip slightly thickened at the anterior extremity; surface 

 marked by microscopic impressed revolving lines. 



Dimensions. — Length *17 in., width -06 in. 



Locality. — Rare from both localities. 



V. minutissima. PL 67, fig. 52. Subglobose; mouth arcuate, subtruncate anteri- 

 orly ; substance of shell moderately thick ; surface minutely granular; a distinct fold 

 is formed by the inner lip anteriorly and bounds the mouth in that direction. 



