10 HELIX CYSTICOPSIS. 



H. columellata AD., Contrib. to Conch., p. 80, (1850). PER., 

 Monographia, iii, p. 30. REEVE, Conch. Icon., f. 298. 



Separated from the other forms by the strong white callus of the 

 columella, which in adults is truncated below. 



* * * 

 Cuban Species. 



H. CUBENSIS Pfeiffer. PL 19, figs. 26-29. 



Imperforate, globose-depressed, fragile, white, roseate or yellowish, 

 unicolored, or encircled by one or two continuous brown bands, or 

 by numerous spiral bands broken into flecks or short longitudinal 

 streaks, usually with a continuous peripheral fascia ; surface slight- 

 ly shining, with light lines of growth ; spire low, apex a little ob- 

 tuse, often pink-tinged ; sutures slightly impressed; whorls about 4, 

 the inner gradually, the last rapidly widening ; body-whorl de- 

 pressed ; aperture rotund-lunar, slightly oblique ; peristome fragile, 

 acute, outer lip well-curved ; pillar-lip nearly vertical, nearly straight, 

 expanded at the umbilical region. Alt. 8-13, diam. 12-15 mill. 



Matanzas and Havana to Cape 8. Antonio, Cuba. 



H. cubensis PER., Wiegm. Archiv., 1840, p. 250; and in Conchy I. 

 Cb. t. 29, f. 9-13. REEVE, Conch. Icon., f. 299. H. lanieriana 

 i/ORB. Moll. Cuba, i, p. 159, t. 7, f. 17-20. H. gilvus d Orb. (in 

 part) t. 8, f. 13-15. Microcystis tri/asciella and M. pictella BECK, 

 teste PER. ? H. penicillata GOULD, Bost. Journ. iv, No. 1, 1842 

 (cover). 



This form differs from all other species of Cysticopsis in being 

 variegated in color, but is allied to them in shape and in the fragile, 

 acute lip. The coloration is extremely variable, as the figures show. 

 Sometimes it is very similar to H. lucipeta Poey, a species of 

 Hemitrochus. The latter species is, however, perforate, and the lip 

 is expanded. I have before me a more obtuse form from Baracoa, 

 Cuba, which is probably the var. theta of Pfeiffer, "Spira paulo 

 elatiore " and which he says comes from Jamaica. 



Figure 37, pi. 19, represents the common variation which 

 d'Orbigny named H. lanieriana ; and fig. 36 is one of the figures of 

 H. gilvus of the same author; his figures 9-12 of "gilvus" repre- 

 sent a Hemitrochus. 



