346 PROCEEDINGS OF THE NATIONAL :MUSEU:\[ vol. 85 



threads and the spiral cords form slender nodules whose long axis 

 is parallel with the axial sculpture, but these nodules are not at all 

 conspicuous. Suture strongly constricted, narrowly channeled. Pe- 

 riphery of the last whorl inflated, well rounded. Base short, in- 

 flated, well rounded, narrowly openly unbilicate, marked by the con- 

 tinuation of the obsolete axial riblets and spiral cords. The latter 

 are of about the same strength as those on the spire, those on the 

 inside of the umbilical wall being almost as strong as those outside 

 of it. Aperture ovate with an inconspicuous auricle at the posterior 

 angle; peristome double, the outer is reflected obliquely and marked 

 by a series of concentric lines at the auricle and the inner lip; the 

 inner is smooth, also expanded and reflected, almost extending to the 

 outer limit of the outer on the outer lip, while on the inner and basal 

 lip the outer peristome is quite a little broader. Operculum pauci- 

 «piral, with subcentral nucleus, the outside covered with a rather 

 thick deposit of calcareous granules. 



This species appears confined to the Isle of Pines, where we are 

 recognizing three subspecies. 



KEY TO THE SUBSPECIES OF CHONDROPOMA (CHONDROPOMA) NICOLASI 



Spiral sculpture strong jolinsoni 



Spiral sculpture feeble. 



Ground color brown , brittoni 



Ground color flesh-color nicolasi 



CHONDROPOMA (CHONDROPOMA) NICOLASI NICOLASI, new sabspecies 



Plate 31, Figure 6 



1916. Chondropoma wilcoxi Henderson, Ann. Carnegie Mus., vol. 10, p. 316 

 (in part). 



This race was collected at Carapatchibey, Isle of Pines, by Dr. 

 Nicolas. It has a flesh-colored ground color, with faint interrupted 

 spiral lines of brown, which appear more like axial streaks than spiral 

 elements. The sculpture is stronger than that of C. {C.) nicolasi 

 hrittoni and less strong than that of C. (C.) nicolasi johnsoni. 



The type, U.S.N.M. no. 493148, has a little more than 4 whorls re- 

 maining and measures: Length, 14.8 mm; greater diameter, 8.2 mm; 

 lesser diameter, 7.2 mm. 



CHONDROPOMA (CHONDROPOMA) NICOLASI BRITTONI, new subspecies 

 Plate 31, FicuiiE 4 



This race was collected by Hermano Leon on the Jorobado Penin- 

 sula, Isle of Pines. It has a brown ground color, with decidedly 

 feeble sculpture. 



