HISPANIOLAN AND BAHAMAN ANNULARIIDAE 95 



two feeble scallops on the base and two strong scallops on the outer 

 edge of the umbilicus. The type measures: Height, 7.2 mm.; greater 

 diameter, 4.4 mm. ; lesser diameter, 3.7 mm. 



U.S.N.M. No. 380316 contains 4 topotypes from the same source. 



ORCUTTIPOMA BOLLKI SEBBATICOSTA (Welnland) 



Plate 14, Figure 12 



1862. Cyclostoma serraticosta Weinland, Malak. Blatter, vol. 9, p. 89. 

 1891. Choanoponia serraticosta Crosse, Journ. Conchyl., vol. 39, p. 165. 



This race appears to occupy a less coastwise range than the others, 

 being apparently more confined to the upland mountainside regions. 

 Weinland had only two specimens, which were collected by Rolle in 

 a wooded valley near Corail. Our specimens also come from the region 

 of Corail, and the top of Mount Rochelois. It is a pale race not quite 

 so stout as rollei, with the axial ribs much more weakly scalloped, which 

 gives them a serrate appearance. 



The specimen figured (U.S.N.M. No. 504015) comes from Corail 

 and has 4.1 whorls remaining, of which the last bears 65 axial riblets 

 and has seven scallops between summit and periphery, two on the base, 

 and one on the outer edge of the umbilicus. It measures: Height, 

 7.0 mm. ; greater diameter, 3.9 mm. ; lesser diameter, 3.4 mm. 



U.S.N.M. No. 504016 contains 6 topotypes from the same source. 



U.S.N.M. No. 504017 contains 10 specimens collected by Henderson 

 and Bartsch at Corail. 



U.S.N.M. No. 380097 contains i specimen collected by Eyerdam at 

 the top of Mount Rochelois. 



Genus PARACHONDROPS Henderson and Bartsch 



1920. Farachondrops Henderson and Bartsch, Proc. U. S. Nat. Mus., vol. 58, 

 pp. 66-67. 



The typical subgenus Farachondrops has not been found in Hispaniola. 



KEY TO THE SUBGENERA OF PARACHONDROPS 



Summit of axial ribs fused to form tufts Clenchipoma 



Summit of axial ribs not fused to form tufts Farachondrops 



Clenchipoma, new subgenus 



Shell cylindroconic. The whorls are marked by axial riblets, some of 

 which are fused into tufts at the suinmit. The spiral sculpture consists 

 of feeble threads, which render the axial riblets weakly nodulose. Base 

 narrowly openly umbilicated. Aperture oval; peristome double. Oper- 

 culum with strongly elevated, retractively curved riblets, which are fused 

 on their inner edge of the opercular turns and terminate outwardly on 

 about the middle of the vv^horls. 



Type species : Farachondrops (Clenchipoma) clenchi, new species. 



