162 BULLETIN 192, UNITED STATES NATIONAL MUSEUM 



tween the lamellose elements. The axial ribs bear six fairly strong scal- 

 lops between the summit and the periphery. These scallops are strongest 

 at the summit and less scalloped at the periphery, while the broad inter- 

 costal spaces are marked by rather well pronounced microscopic spiral 

 threads, which are not quite so wide as the spaces that separate them. 

 Suture moderately strongly constricted. Periphery well rounded. Base 

 marked by the axial riblets, which here bear two scallops, while the wall 

 of the moderately broadly open umbilicus has scarcely any indication of 

 scallops. Aperture almost circular; peristome double, the inner exserted 

 and slightly reflected; the outer broadly flaringly expanded, narrower 

 on the parietal wall than the rest and marked by concentric spiral 

 lamellae. Operculum with central nucleus. 



The type (U.S.N.M. No. 504137) was collected by C. R. Orcutt on 

 a hill north of Coteaux, Haiti, east of the river. It has 4 whorls remain- 

 ing and measures : Height, 7.5 mm. ; greater diameter, 4.6 mm. ; lesser 

 diameter, 3.6 mm. 



It resembles most nearly Weinlandipoma hlandii from which it can 

 readily be differentiated by the much stronger scallops. 



U.S.N.M. No. 404731 contains 47 topotypes. 



U.S.N.M. No. 403964 contains 3 specimens collected by Orcutt from 

 Anse a Drick. 



U.S.N.M. No. 402772 contains 6 specimens collected by Orcutt near 

 Les Cayes. 



U.S.N.M. No. 402764 contains 4 specimens collected by Orcutt on a 

 steep wooded slope in a dry ravine at Les Cayes. 



U.S.N.M. No. 404964 contains 8 specimens collected by Orcutt at the 

 Shell Sugar Plantation at Les Cayes. 



U.S.N.M. No. 403305 contains 15 specimens collected by Orcutt at 

 Aquin. 



WEINLANDIPOMA BI.ANDII (Weinland) 



Plate 28, Figure 10 



1880. Choanopoma hlandii Weinland, Jahrb. deutschen malak. Ges., vol. 7, p. 341. 

 1920. Annularia (Annularia) hlandi Henderson and Bartsch, Proc. U. S. Nat. 

 Mus., vol. 58, p. 7Z. 



Shell elongate-conic, very thin, flesh-colored, with broad interrupted 

 spiral bands of pale brown, which conspicuously ray the expanded outer 

 peristome. Nuclear whorls 2, well rounded, microscopically granulose. 

 Postnuclear whorls strongly inflated, well rounded, marked by very 

 strong, lamellar, slightly retractively curved axial ribs, of which 34 are 

 present on the last turn. These axial riblets are strongly expanded into 

 auricles at the summit and feebly scalloped on the rest. The broad spaces 

 between the axial riblets are marked by fine spiral striations. Suture 

 strongly constricted. Periphery strongly rounded. Base moderately long, 

 inflated, strongly rounded and marked by the continuation of the axial 

 riblets which extend into the umbilicus and two strong scallops; within 



