THE CYCIjOPHORID LAHS^D M0LLUSK9 OF AMERICA 77 



this species varies very greatly, and that specimens meeting all the 

 requirements of Chitty's parva may be found in any of the colonies. 

 They merely represent individual variation, not zoogeographic races. 

 This species is distributed through western St. Elizabeth Parish 

 and the adjacent region of Westmoreland Parish. 



CYCLOPILSBRYA (CYCLOPILSBRYA) CARmAEA (Clench and Apiayo) 



Plate 13, Figures 43-45 



1843. Cyclostoma corrugatum G. B. Sowerby, Proc. Zool. Soc. London, vol. 11, 

 p. 30 (not Cyclostoma corrugatum Menke, Synopsis methodica mol- 

 luscorum . . . p. 39, 1830). 



1935. Poteria cfiriMea Clench and Aguato, Nautilus, vol. 49, p. 51, pi. 3, figs. 5, 6. 



Shell large, helicoid. The nuclear whorls are pale brown, while the 

 succeeding turns are chestnut-brown, gi-adually fading to flesh color. 

 The nucleus consists of 1.5 well rounded, smooth turns. The post- 

 nuclear whorls are inflated, strongly rounded, all but the last 1.5 turns 

 marked by slender, rather weak and moderately distantly spaced, 

 slightly retractive axial riblets. The last 1.5, in addition to this 

 sculpture, are marked by strong wrinkles, which are very strong near 

 the summit and there almost vertical in position; below this there 

 are oblique wrinkles, which are arranged in a more or less ill-defined 

 zigzag fashion. Suture strongly impressed except on the last turn, 

 which is slightly appressed to the preceding turn. Periphery strongly 

 rounded and marked by the continuation of the axial sculpture. Base 

 inflated, strongly rounded, with very coarse, oblique, protractively 

 slanting wrinkled cords, which radiate from the outer edge of the 

 umbilicus toward the periphery, weakening somewhat toward the 

 periphery. The base is rather narrowly openly umbilicated and the 

 umbilical wall is marked by coarse, almost lamellar axial riblets and 

 fine lines of growth. Aperture circular, slightly protracted into an 

 angle at the posterior angle; outer lip thin, the mner somewhat 

 thickened. Operculum typically cyclopilsbryid. 



The specimen figured is one of a lot, U.S.N.M. No. 535696, collected 

 by B. W. Oruda at Spring Mount, St. James Parish, Jamaica, and 

 received from the Museum of Comparative Zoology. It has 5 whorls 

 and measures: Height, 16.8 mm.; greater diameter, 24.8 mm.; lesser 

 diameter, 18.0 mm. 



This species was first recognized by G. B. Sowerby, who called it 

 Cyclostoma corrugatum; that name being preoccupied by Menke's 

 corrugatum, the adoption of Clench and Aguayo's name caribaea 

 becomes necessary. 



The species is rather widely distributed, ranging through Hanover, 

 Westmoreland, St. James, and St. Elizabeth Parishes. 



428349 — 42 Q 



