58 BULLETIN 192, UNITED STATES NATIONAL MUSEUM 



the axial ribs becoming a little less strong on the base than on the spire, 

 while the spiral threads have about the same strength. Last whorl ap- 

 pressed or a trifle solute. Aperture ovate; peristome double, the outer 

 forming a slight auricle at the posterior angle, expanded and reflected, 

 broader on the parietal and inner lip than on the outer; the inner 

 peristome is slightly elevated above the outer, slightly expanded and 

 slightly reflected. Operculum corneous, paucispiral, with submarginal 

 nucleus, the outside covered with a thin deposit of fine calcareous 

 granules. 



The specimen figured (U.S.N.M. No. 493302) comes from St. Marc, 

 Haiti. It has a little more than 4 whorls remaining and measures: 

 Length, 19.2 mm. ; greater diameter, 12.2 mm. ; lesser diameter, 9.8 mm. 



Chondropoma (Chondropoma) semilabris (Lamarck) has met with 

 many vicissitudes. We believe this species, which occupies the Cul-de- 

 Sac region north to St. Marc, to be the true semilabris (Lamarck). There 

 is considerable variation in size, the specimens about St. Marc being 

 larger than those to the south, and it is possible that careful collecting 

 with specific locality data may require the breaking up of this species 

 into a number of local races. 



U.S.N.M. No. 493303 contains 2 specimens from the same source. 



U.S.N.M. No. 162938 contains 3 specimens collected by Henderson 

 and Simpson at St. Marc, Haiti. 



U.S.N.M. No. 471978 contains 6 specimens collected by Henderson 

 at St. Marc. 



U.S.N.M. No. 392845 contains 95 specimens collected by Bartsch on 

 a bluff I mile north of St. Marc. 



U.S.N.M. No. 471979 contains 6 specimens collected by Henderson 

 and Bartsch at 200-300 feet altitude above St. Marc. 



U.S.N.M. No. 493304 contains 47 specimens collected by Henderson 

 and Bartsch between Kilometer 85 and 90 on the road from Port-au- 

 Prince to St. Marc. 



U.S.N.M. No. 393799 contains 48 specimens collected by Bartsch 4 

 miles from St. Marc. 



U.S.N.M. No. 471980 contains 7 specimens collected by Bartsch in 

 the mountains above L'Arcahaie, Haiti. 



CHONDROPOIA (CHONDROPOMA) BLANCHARDI, new species 



Shell ovate, pale straw-colored, with distantly spaced, very feeble in- 

 terrupted spots of brown, which have both an axial and spiral arrange- 

 ment. The nuclear whorls are decollated in all our specimens; the post- 

 nuclear whorls are inflated, strongly rounded, very narrowly shouldered 

 at the summit, and marked by numerous slender, rather closely spaced, 

 retractively slanting axial riblets and a little more distantly spaced and 

 a little stronger spiral threads. The junctions of these two elements form 

 feeble, rounded nodules, while the spaces inclosed between them are 



