52 BULLETIN 192, UNITED STATES NATIONAL MUSEUM 



KEY TO THE HISPANIOLAN SPECIES OF THE SUBGENUS CHONDROPOMA 



Peristome double. 



Outer peristome uniformly broadly flaringly expanded. 

 Last whorl strongly granular. 



Shell very broadly ovate manielense 



Shell ovate but not very broadly ovate. 



Shell large and stout gonavense 



Shell small and slender genevievae 



Last whorl obscurely granular blandum 



Outer peristome not uniformly broadly flaringly expanded. 

 Outer peristome of inner lip broader than the rest. 



Shell large semilabris 



Shell small blanchardi 



Outer peristome of inner lip not broader than the rest. 

 Outer peristome of inner lip narrower than the rest. 



Axial ribs lamellose annae 



Axial ribs not lamellose. 

 Shell ovate. 



Granulation fine quisquense 



Granulation coarse eyerdami 



Shell elongate-ovate tortugaense 



Outer peristome of inner lip not narrower than the rest. 

 Shell of turbinid outline. 



Granulation strong rabelense 



Granulation feeble abbotti 



Shell not of turbinid outline, ovate. 



Granulation strong montalbense 



Granulation feeble molense 



Peristome single. 



Truncated shell more than 15 mm. long brownianum 



Truncated shell 13 mm. long or less. 

 Shell narrowly umblicated. 



Whorls short and strongly inflated solum 



Whorls larger and less inflated catalinense 



Shell broadly umblicated vanattae 



CHONDROPOMA (CHONDROPOMA) MANIELENSE, new species 



Shell broadly ovate, almost turbinate, rather w^idely umbilicated, 

 varying from flesh-colored to pale orange, marked with interrupted, 

 rather broad spiral bands of brown, the elements of which are also ar- 

 ranged in axial series. These markings are present on spire and base. 

 The expanded peristome is pale yellow. Nuclear whorls 2.5, well 

 rounded, smooth except for the last portion, which shows the beginning 

 of the postnuclear sculpture. These turns form a rather large elevated 

 apex. Postnuclear whorls inflated, strongly rounded, and marked by 

 narrow threadlike spirals and less conspicuous, somewhat broader axial 

 ribs, the junctions of the two forming conspicuous, strongly elevated, 

 elongate nodules whose long axis coincides with the spiral threads. The 

 spaces that separate these spiral threads are about three or four times 

 as wide as the threads, and the spaces that separate the axial riblets 

 are also wider than the riblets. Suture very slightly channeled. Periph- 



