CUBAN SUBFAMILY CHONDROPOMINAE — TORRE AND BARTSCH 363 

 CHONDROPOMA (CHONDROPOMODES) ERNESTI ERNESTI Pfeiffer 



Plate 35, Figure 4 



1862. Chondropoma ernesti Pfeiffer Malakozool. Blatter, vol. 9, p. 5. 



The typical subspecies was collected by Jeanneret at Seboruco, 

 south of Mayari. 



The specimen that we have figured, U.S.N.M. no. 367804, is one 

 received by Dr. de la Torre from Jeanneret. It has a little more 

 than 4 whorls remaining and measures: Length, 14.4 mm; greater 

 diameter, 8.9 mm ; lesser diameter, 7.0 mm. 



It is easily distinguished from C. (C.) ernesti clenchi by having 

 the axial riblets and spiral threads more closely spaced. 



CHONDROPOMA (CHONDROPOMODES) ERNESTI CLENCHI Aguayo 



Plate 35, Figure 6 



1932. Chondropoma ernesti clenchi Aguayo, Occ. Pap. Boston Soc. Nat. Hist, 

 vol. 8, p. 33, pi. 3, fig. d. 



This subspecies was collected by Aguayo at Las Cuevas, Holguin, 

 Oriente. It differs from the typical C. (C.) ernes fi ernesti in being 

 more inflated, that is, more broadly ovate, and in having both the 

 axial and spiral sculpture more distantly spaced and the outer peri- 

 stome more broadly expanded. 



The specimen described and figured is a holotype and is located 

 in the Museum of Comparative Zoology at Cambridge, Mass., where 

 it is listed as no. 47999. 



Subgenus Chondropomorus Henderson and Bartsch 



1920. Chondropomorus Hbndebson and Bartsch, Proc. U. S. Nat. Mus., vol. 58, 

 p. 61. 



Shell elongate-conic ; marked b}?^ both axial and spiral threads, the 

 axial threads being gathered into tufts at the summits of the whorls. 

 Type : Cyclostoma dentatum Say. 



KEY TO THE SPECIES OF SUBGENUS CHONDROPOMORUS 



Peristome simple. 



Tufts at summit very regular revinctum 



Tufts at summit irregular auberianum 



Peristome double. 



Outer peristome of inner lip broadly expanded. 



Sculpture coarse and irregular delatreanum 



Sculpture fine and regular neglectum 



Outer peristome of inner lip not broadly expanded. 



Peristome auriculate at posterior angle dilatatum 



Peristome not auriculate at posterior angle canescens 



