CERION, GROUP V. 209 



are strong, but narrower than their intervals, nearly regular, slightly 

 curved, 30-32 on the penult, whorl. Terminal cone rather attenu- 

 ated above, the lateral outlines being straight or even slightly concave. 

 Aperture truncate-ovate, purplish- or yellowish-brown in the throat, 

 the lip ivory-white. Parietal lamella narrow, rather long, usually 

 with a low continuation inward. Axial lamella small but rather 

 acute. 



Length 31-33, diam. 14 mill. 



Length 29J, diam. 13J mill. 



Length 26, diam. 11 mill. (Krister's type, fig. 37). Cuba. 



Pupa multicosta KUSTER, Conchyl. Cab., Pupa, p. 77, pi. 11, f. 

 6, 7. PFR., Monogr., ii, p. 323. Pupa multicostata SOWB., Conch. 



Icon., xx, pi. 2, f. 13 ?? Helix decumanus var. a FERUSSAC, 



.Tabl. Syst., p. 59, no. 462 (based upon Lister, pi. 588, f. 47). 



Pupa decumana GRAY, Ann. of Philos. (new ser.), ix, p. 413. PFR., 

 Monogr., ii, p. 320 (except references to Sowerby and Reeve). 



The original locality was merely " West Indies," and the original 

 description and figures apply about as well to some Bahaman forms 

 as to the Cuban. Although so much must be admitted, I consider 

 it best to retain the traditional identification with the Cuban form 

 defined above; thinking it impossible to better it. 



C. multicostum differs from C. torrei ornatum in the longer or at 

 least more attenuated terminal cone, and the longer parietal lamella, 

 which has usually a low continuation or prolongation inward. It is 

 wider than C. maritimum, and has stronger ribs. 



None of the specimens before me, some five lots from three sources, 

 bear label more definite than "Cuba;" and Arango gives nothing 

 more. It is probably from the northern shore of the eastern end of 

 the island. 



The variety referred here by Kiister (C. Cab. pi. 10, f. 1, 2) is of 

 doubtful identity, but I think it is probably maritima, as Pfeiffer sus-. 

 pected. 



The figure in Lister upon which Pupa decumana Gray was based! 

 is not determinable. 



The Pupa tumidula of Deshayes seems to have no differential 

 characters of importance. The original description here follows : 



Pupa tumidula. (PL 30. fig. 71.) Shell ovate-acuminate, in- 

 flated, short, grayish- white, the apex obtuse; longitudinally plicate- 

 costate ; spire with conic apex; whorls 10, narrow, the last convex 



