C.ECILIOIDES, SECT. GEOSTILBIA. 43 



having an appearance of truncation, which does not really exist; 

 hardly reaching to the base; basal margin rounded; outer lip 

 arching forward, subacute. Length 2, diam. 0. 66 mm . ( Orosse). 



Brazil: Soure, on the island of Joannes or Juanes, in the 

 mouth of the Amazon, Province of Para. 



Geostilbia blandiana CROSBE, Journ. de Conchy 1. 1880, p. 149 

 1886, p. 137, pi. 1, f. 4. 



The figure of this species, which I have copied, represents 

 the spire as far more tapering than in C. iota or C. consobrina. 

 Whether this figure is approximately correct or not I am unable 

 to say. 



Section Geostilbia Crosse. 



Geostilbia CROSSE, Journal de Conchy 1. 1867, p. 184, type 

 G. caledonica Crosse. 



The shell is similar to Ctecilioides except in having the colum- 

 ella continuous with the basal lip, being separated therefrom 

 only by a slight sinuation, not an abrupt truncation. Type 

 G. caledonica. 



The number of valid species of this group is uncertain, but 

 several of them surely stand close to C. gundlachi. C. baldwini, 

 C. balanus and C. mauritiana are doubtfully distinct. 



40. C. GUNDLACHI (Pfeiffer). PL 4, figs. 73, 74. 

 J^Shell subulate, acicular, glossy, clear-greenish; spire slender, 

 the apex a little acute; suture deep, margined. Whorls 5, 

 rather convex, the last slightly over one-third the total length. 

 Columella slightly arcuate, shortly truncate above the base of 

 the narrow, angularly oval aperture; peristome simple, the mar- 

 gins joined by a thin callus, the right margin arching forward. 

 Length 5, diam. 1.33, aperture 1.75x.66 mm. (Pfr. ). 



Cuba: Havana, Guanajai and Guantanamo (Gundlach); near 

 Cienfuegos. Jamaica. Haiti: Port-au-Prince and Les Cayes. 

 St. Thomas (Bland). St. Martin. Guadeloupe. Barbados. 

 Demarara (Swift coll.). Princeton, New Jersey (A. D. Brown). 

 St. Helena (Benson). 



Achatina gundlachi PFR., Zeitschr. f. Malak., 1850, p. 80; 

 Conchyl. Cab., Bulimus, p. 358, pi. 29, f. 10, 11; Monogr., iii, 

 505; iv. 623; vi, 239; viii. 294. Geostilbia gundlachi CROSSE, 



