THE CYOLOPHORiID LAND M0LLUSK9 OF AMiElRIOA 65 



in strength, whitish with a thin soiled-yellow periostracum. The apex 

 does not project materially and is rather obtuse. Suture deeply 

 channeled. Whorls 4.5, convex, the last descending, keeled above and 

 solute. Aperture scarcely oblique, circular; peristome simple and 

 acute. Operculum typical. Height, 7.0 mm.; greater diameter, 

 12.0 mm. ; lesser diameter, 9.0 mm. Aperture, 4 mm. broad and wide. 



The above is a translation of Shuttleworth's description to which 

 he adds, "Habitat, Haiti Salle." 



I have mapped Salle's travels in the island of Hispaniola. They 

 did not extend into the range of what I am here calling C. {C.) vortex 

 (Weinland), which occupies the western portion of the south penin- 

 sula, and which has been at times confused with the present species. 



C. (C.) floccosum (Shuttleworth) is from Santo Domingo. The 

 United States National Museum collection contains other species from 

 Santo Domingo, but it does not have representatives of C. (C.) -floc- 

 coswn. For that reason I am copying Reeve's figure. 



CROCIDOPOMA (CROCIDOPOMA) CASUELENSE Crosse 



Plate 41, Figubes 7-9 



1891. Crocidopoma casuelense Ceosse, Journ. Conchyl., vol. 39, p. 161. 

 1902. Crocidopoma casuelense Kobelt, Das Tierreich, Cyclophoridae, pp. 259-260, 

 fig. 54. 



Shell planorbid, covered with a thin yellow periostracum (nuclear 

 whorls decollated). The postnuclear whorls are strongly rounded 

 and marked by strong spiral keels, of which 7 are present on the first 

 lemaining turn between the summit and the periphery, and 12 on 

 the same space on the last turn. The first keel at the suture is only 

 a trifle heavier than the remaining ones. The spaces between these 

 keels are broader than the keels. The axial sculpture consists of fine 

 hair lines, and the last whorl is solute for about one-tenth of a turn. 

 Suture very deeply impressed. Periphery well rounded. Base very 

 broadly openly umbilicated and marked by 6 spiral keels equaling 

 in strength those on the spire. There are 7 additional spiral keels 

 of equal strength and spacing on the umbilical wall. On the base 

 and umbilical wall the keels are narrower than the spaces that separate 

 them. Aperture subcircular; peristome slightly reflected, thin. 

 Operculum typically crocidopomid. 



The specimen described and figured, U.S.N.M. No. 331865, is one 

 of the Redfield collection collected by Cuming. It has 3 postnuclear 

 whorls remaining and measures : Height, 5.2 mm. ; greater diameter, 

 10.5 mm. ; lesser diameter, 7.7 mm. I have been unable to locate the 

 exact position of Casuela in Hispaniola. 



