

CEPOLIS. 179 



Jeanneretia by C. squamosa, subtussulcata, etc.; C. exdeflexa is a 

 transition between Jeanneretia and Eurycampta, and is not far 

 from some of the Plagioptychas, while nemoralina, filicosta and 

 maynardi bridge the gap between Plagioptycha and Hemitrochus. 



I am unable to find in Hemitrochus and Polymita any general 

 system or plan in the distribution of bands, such as occurs in the 

 five-banded Helices of Europe or in the epiphallogonous groups of 

 Asia and Australia. I believe that the color schemes of the arbo- 

 real West Indian forms have been independently evolved, with the 

 exception of the supra-peripheral band, which may possibly be 

 homologous with that of Campylaea, Tachea, etc. 



A prominent feature in some species of this genus is the tooth 

 within the mouth of the shell, marked by an external pit. A simi- 

 lar structure occurs in Solaropsis, Planispira, Neocepolis, etc., but 

 it does not seem to be of generic or even subgeneric value in any 

 group. 



The sectional divisions are as follows : 

 f Cepolis. f Plagioptycha. 



J Jeanneretia. Cyst.cops.s. 



-r, Hemitrochus. 



EuryCampta ' [Coryda+Dialeuca. 



Section Cepolis Montf., 1810. 



Cepolis MONTF., Conch. Syst. ii, p. 150 (type nicolsinianum Montf. 

 =cepa Mull.) ; Cepolum MONTF., 1. c. p. 151. 



Shell rather solid and of moderate or large size, imperforate or 

 umbilicate, compact, globose- depressed, opaque, striate or malleated, 

 2 or 3 banded, the spire low, conic or convex ; whorls less than 5, 

 the last abruptly deflexed in front, having a pit below the periphery 

 a short distance behind the lip, which inside the shell appears as a 

 callous fold a short distance within the outer lip. Aperture quite ob- 

 lique, truncate-oval, the lip expanded ; columellar lip reflexed, 

 armed inside with a compressed or entering tooth. Type C. cepa, pi. 

 25, fig. 9. 



Soft anatomy unknown. Distribution, Hayti. 



Differs from Jeanneretia mainly in the stronger columellar tooth 

 and the constant deep pit behind the lip forming a callous fold 

 within the mouth. 



