1922] NATURAL SCIENCES OF PHILADELPHIA. 59 



Centrals. Comb Marginals Grand 



A B C Lateral 12 3 Total Total 



E. a. columellaris 1 2 26 71 153 



E. chrysostoma 0? (Troschel) 



E.pulchella 1 40 62 135 



E.tankervillii 0? 90+? (Troschel) 90+ 191 + 



E. stellate 2 39 104 219 



E.torrei 2 43 111 233 



V. regina 1 25 5 14 100 211 



C.mouhoti 1 10 1 28 67 



Genus EUTROCHATELLA Fisher. West Indies; Guatemala; Venezuela??? 



Subgenus TROSCHELVIANA new subgenus. Western Cuba. 

 Type H. erythraea "Wright" Sowerby (1866). 

 Section Tboschelviana s. s. Western Cuba. 



In this section the radulae of the type species 42 , E. mestrei 43 , 

 and E. jugulata 44 have been examined. In addition, the radula 

 of E. chrysochasma has been described and figured by Troschel 

 (1856-63). As he pointed out clearly the distinctness of this group, 

 which is almost worthy of generic separation, it is but fitting that 

 it bear his name. The radula of E. erythraea is figured here (Plate 



VI, fig. 27) and the formulae of all four species are included in Table 

 IV. 



The paired centrals of these species have large and well-developed 

 cusps: 3 on each A and B central and 4 on the C-central. The T- 

 lateral, although quite similar in shape to that in the rest of the 

 genus, bears a number of well-marked cusps on its inner edge. The 

 accessory plate bears a stout hook, which fits over the inner branch 

 of the stalk to the T-lateral. The unicuspid marginals are not 

 very numerous, and bear long, sharp blades. 



The shells of the species in this group are rather small, and are 

 more elevated than in any other helicinid group. They lack the 

 distinct spiral sculpture of the rest of the genus Eutrochatella. 

 From these shell characters, I think that the following species 

 should be included in this group: 



E. alboviridis ("Wright" Pfr.) (1864). 



??E. trochulina (d'Orbigny) (1845) Cuba. (Not the Haitian citations). 



E. erythraea ("Wright" Sowerby) (1866). Type species. 



H. rubella "Wright" Pfr. (1864), not of Green (1832). 



E. rubella citrinocallossa A. J. Wagner (1908). 

 E. jugulata (Poey) (1856). 

 E. chrysochasma chrysochasma (Poey) (1853). 



42 2 dried specimens; A. N. S. P. no. 14868; from Cuba; collected by Wright, 



43 2 dried specimens; A. N. S. P. no. 98798; Mogotes de la Cerro de Cobras, 

 Cuba; collected by J. B. Henderson (1909). 



41 2 alcoholic specimens; from Western Cuba; sent me by J. B. Henderson. 



