HISPANIOLAN AND BAHAMAN ANNULARHDAE 



161 



inflated, openly umbilicated, and marked by the continuation of the axial 

 ribs and three spiral threads; two faint additional spiral threads are 

 present on the outer edge of the umbilical wall. Aperture circular ; peri- 

 stome double, the inner well exserted ; the outer very broadly expanded, 

 of almost the same width all around, adnate to the preceding turn and 

 marked by a series of concentric lamellae. Operculum with almost central 

 nucleus bearing a broad, spiral, obliquely sloping lamella, which is reen- 

 forced by numerous obliquely slanting threads. 



U.S.N.M. No. 355953 contains 121 specimens collected by John B. 

 Henderson and the author at Miragoane, Haiti, the type locality, on the 

 north coast of the southern peninsula, one of which we have described 

 and figured. This has 3.8 whorls remaining and measures: Height, 

 8.3 mm. ; greater diameter, 6.6 mm. ; lesser diameter, 4.6 mm. 



One hundred specimens yield the following average measurements : 



U.S.N.M. No. 379994 contains 194 specimens collected by Eyerdam 

 in a forest half a mile back of Miragoane. 



U.S.N.M. No. 380272 contains 217 specimens collected by Eyerdam 

 in woods half a mile north of Miragoane. 



U.S.N.M. No. 3801 14 contains i specimen collected by Eyerdam at 

 Miragoane. 



U.S.N.M. No. 380055 contains 3 specimens collected by Eyerdam 2 

 miles northeast of Miragoane. 



U.S.N.M. No. 380034 contains 12 specimens collected by Eyerdam 

 I mile north of Miragoane. 



U.S.N.M. No. 380423 contains i specimen collected by Eyerdam under 

 rocks on a wooded hillside west of Miragoane. 



This species is readily distinguished from Weinlandipoma excisum by 

 having the peristome of the same width all around and in lacking the 

 excised parietal wall element. 



WEINLiANDIPOMA ORCUTTI, new speoies 



Plate 28, Figure 6 



Shell elongate-ovate, flesh-colored, with feeble interrupted spiral bands 

 of brown, which appear as rays on the expanded outer peristome. Nu- 

 clear whorls 2, inflated, strongly rounded, microscopically granulose. 

 Postnuclear whorls marked by lamellar axial ribs, of which 38 are 

 present on the last turn. Occasionally a finer axial thread appears be- 



