THE CYCIjOPHORID LAND MOLLUSKS OF AMEKICiA 75 



while on the outside there is scarcely any impression. The umbilical 

 keel itself is rendered rough by the incremental lines and immediately 

 outside of this there are a few faint obsolete pits. The rest of the 

 base is almost smooth or at best exceedingly faintly, irregularly, 

 obsoletely nodulose. Aperture circular, protracted into a decidedly 

 clawlike element at the posterior angle; outer lip of the peristome 

 thin, the inner thickened, particularly so at the junction with the 

 basal keel. Operculum typically cyclopilsbryid. 



The specimen figured, Acad. Nat. Sci. Philadelphia, No. 174130, 

 is one of a series collected by Dr. H. B. Baker on the hills north of 

 Retreat, Westmoreland Parish, Jamaica. It has 5 whorls and meas- 

 ures : Height, 19.0 mm. ; greater diameter, 24.3 mm. ; lesser diameter, 

 18.0 mm. It resembles most closely G. (0.) glenhumiensis, from 

 which the feeble basal sculpture will readily differentiate it. 



The species is found on both sides of the boundary on the south 

 side of Westmoreland and St. Elizabeth Parishes. 



CYCLOPILSBRYA (CYCLOPILSBRYA) STRIOSA (Chitty) 



Plate 12, Figures 27-29 



1857. Cyclotus jugosus striosus Chitty, Proc. Zool. Soc. London, vol. 25, p. 156. 



Shell very small, decidedly depressed-helicoid ; the early whorls 

 reddish, gradually changing to wax yellow on the last turn. The 

 nucleus consists of about 1.5 strongly elevated smooth turns; the 

 succeeding whorls are marked by strongly elevated axial ribs, which 

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

 on the last turn are most conspicuous on the oblique wrinkles. Be- 

 ginning with the last whorl, rather rough, decidedly obliquely re- 

 tractively slanting cords, which are about as wide as or a little wider 

 than the spaces that separate them, make their appearance. These 

 cords are well elevated and extend enfeebled to the summit. Near 

 the summit they assume a little more vertical direction. Suture 

 strongly constricted, even on the last whorl. Periphery well rounded 

 and marked by the sculpture of the spire. Base inflated, strongly 

 rounded, very openly umbilicated, with the merest indication of an 

 umbilical keel. The strong oblique cords described for the spire ex- 

 tend over the entire base and pass down on the umbilical wall as less 

 strong riblets. Aperture circular, slightly angulated at the posterior 

 angle ; outer lip of the peristome thin ; the inner is slightly thickened. 

 Operculum typically cyclopilsbryid. 



The specimen figured, U.S.N.M. No. 168515, is one of a lot col- 

 lected by Henderson and Simpson at Ipswich in the northwestern 

 part of St. Elizabeth Parish, Jamaica. It has 4.5 whorls and meas- 

 ures: Height, 9.3 mm.; greater diameter, 14.4 mm.; lesser diameter 

 10.8 mm. 



