110 BULLETTDST 181, IINITE© STATEIS NlAiTTO!NlAlL MUSEtlM 



Parishes. Its larger size and more elevated form will readily dis- 

 tinguish it from its more western relative. 



The specimen figured, U.S.N.M. No. 375939, was collected by Orcutt 

 at Carisbrook, St. Elizabeth Parish. It has 5.5 whorls and measures: 

 Height, 21.0 mm.; greater diameter, 26.6 mm.; lesser diameter, 

 20.3 mm. 



POTERIA (POTERIA) LINEATA CYCLOATA (Chitty) 

 Plate 16, Figures 7-9 



1857. Cyclotns cycloatus Chitty, Proc. Zool. Soc. London, vol. 25, p. 148. 

 1898. Neocyclotus (Plectocyclotus) cycloatus Kobelt and Mollendobff, Nachrb. 

 deutschen malak. Ges., vol. 29, p. 138, reprint. 



This subspecies appears to be confined to the southwestern part 

 of Westmoreland Parish. It is distinguished from the typical P. 

 (P.) I. lineata (Gray) in being smaller and less elevated, with a 

 weaker umbilical keel, and in having the last whorl usually not so 

 strongly appressed to the preceding turn. 



The specimen figured, U.S.N.M. No. 356017, is one of a large series 

 collected by Henderson at Mount Pleasant, Westmoreland Parish, 

 Jamaica. It has 5.2 whorls and measures : Height, 16.0 mm. ; greater 

 diameter, 23.1 mm. ; lesser diameter, 17.3 mm. 



POTERIA (POTERIA) CORRUGATISSIMA (Chitty) 

 Plate 16, Figubes 37-39 



1857. Cyclotus corrugatissimus Chitty, Proc. Zool. Soc. London, vol. 25, p. 155. 

 1898. Neocyclotus (Plectocyclotus) corrugatissimus Kobelt and Mollendokff, 

 Nachrb. deutschen malak. Ges., vol. 29, p. 138, reprint. 



Shell large, very depressed-helicoid, covered by a chestnut-brown 

 periostracum. The nucleus consists of a little more than one moder- 

 ately rounded smooth whorl. The postnuclear whorls are strongly 

 rounded, slightly flattened toward the summit. The first 2.5 are 

 marked by strong, retractively curved axial riblets, which are sep- 

 arated by spaces about 1.5 times as wide as the riblets. Beyond this 

 wrinkles make their appearance. These consist of two series : Strong 

 wrinkles, which extend from the summit toward the periphery, being 

 strongest at the summit and fading ventrally, having a protractive 

 slant; these are crossed by even more oblique, less strong wrinkles, 

 which are decidedly retractively slanting, the combination forming a 

 peculiar pattern. Suture strongly impressed on the early whorls, 

 less conspicuous on the last, where the summit of the whorl is strongly 

 appressed to the preceding turn. Periphery marked by the combina- 

 tion of the sculpture described for the spire. Base moderately 

 rounded, very widely openly umbilicated, with a strong keel marking 



