CEPOLIS-POLYMITA. 187 



Animal light colored, otherwise as in Coryda. Jaw high arched, 

 smooth, with a large median projection (pi. 57, fig. 44, C. 

 cubensis*). 



Radula long. Teeth with long, narrow basal plates, the median 

 and lateral teeth without side cusps, transition and marginal teeth 

 with an ectocone, the meso- and ento-cones united into a large bitid 

 cusp (pi. 57, fig. 40, C. cubensis). The teeth of pemphigodes figured 

 by Binney are of the same type, but with shorter cusps. 



Genitalia (of C. cubensis, pi. 52, fig. 16), as in ffemitrochus, ex- 

 cept that I see but one lobe to the mucus gland ; the very long penis 

 is apparently without retractor. Possibly the second lobe of the 

 mucus gland was inadvertently removed in my dissection. 



Morch, in his original publication of this group, mentioned only 

 one species, H. cubensis Pfr. The authors of the second edition of 

 Die Heliceen were therefore not justified in naming H. tenerrima as 

 type of Cysticopsis, and excluding cubensis from the roll of its mem- 

 bers. On an earlier page of this work (p. 65), the writer has sepa- 

 rated the Jamaica species formerly referred to this genus, and has 

 shown them to belong to a separate genus, Zaphysema, near the Sagda 

 group. The external features of the animal, its jaw, teeth and 

 genitalia, all support this division. 



Cysticopsis is allied on one side to the Cuban band-dotted forms 

 of Hemitrochus, and on the other to the group of Plagioptychas 

 like diaphana. 



C. cubensis Pfr., v, 10. C. auberi Orb., v, 11. 



lanieriana Orb. C. pemphigodes Pfr., v, 12. 



trifasciella Beck. pelliculata Poey. 



pictella Beck. C. lescaillei Gundl., v, 13. 



N.pulchella Beck. C. luzi Arango, v, 13. 



penicillata Old., v, 33. C. lassevillei Gundl., v. 14. 



ncevula Morel., v, 34. C. pellicula Fer., v, 14. 



C. comes Poey, v, 11. 0. jaudenesi Cisn., v, 14. 



C. letranensis Pfr., v. 11. C. hjalmarsoni Pfr.,v, 12. 



Genus POLYMITA Beck, 1837. 



Polymita BECK, Index Moll., p. 44 (picta, globulosa, versicolor, 

 carnicolor'). GRAY, P. Z. S., 1847, p. 171, type H.picta. MARTENS, 

 Die Hel., 1860, p. 145, type H. muscarum. W. G. BINNEY, Ann. 



