44 OaSCILIOIDES, SECT. GEOSTILBIA. 



Journ. de Conchy!., xxi, 1873, p. 355 (Haiti); 1874, p. 88; 

 1890, p. 23, 250; 1891, p. 151. BINNET and BLAND, Ann. 

 Lye. N. H. of N. Y., xi, 1875, 152, 185, pi. 13, f. D, G, H, I. 

 -MAZE, Journ. de Conch., 1883, p. 7, pi. 1, f. 1 (Guadeloupe). 

 CROSSE et FISCHER, Miss. Sci. Mex., Mollusques, i, p. 587, 

 pi. 28, f. 14, 15 (copied from Binney). C&cilianella gundlachi 

 BINNEY, Ann. N. Y. Acad. Sci., iii, p. 101, pi. 16, f. F, G 

 (jaw), pi. 7, f. F (teeth). ARANGO, Fauna Mai. Cubana, p. 99. 

 BROWN, Journ. of Conch., x, 270 (Barbados). Macrospira 

 aperta Guild., Swainson, Lardner's Cabinet Cyclopedia, Mala- 

 cology, 1840, p. 335, figs. 97 e, /(p. 333). Geostilbia aperta 

 E. A. SMITH, Proc. Malac. Soc. Lond., i, 1895, p. 307 (St. 

 Vincent); P. Z. S., 1892, p. 269 (St. Helena). Achatina veru 

 BENSON, Ann. Mag. N. H., xviii, 1856, p. 435. WOLLASTON, 

 Testacea Atlantica, p. 545. 



Pfeiffer's description of this shell is not very good. It tapers 

 regularly to the very obtuse, rounded apex. There are 5 whorls, 

 very obliquely coiled, quite convex, and parted by impressed 

 sutures. The last whorl is evenly convex. The aperture is 

 ovate, effuse at the base; the outer lip arches forward strongly 

 in the middle. The columella is a little concave, and near the 

 base is obsoletely truncate. It has a rather heavy callus in 

 most fully adult shells, which passes up over part of the parietal 

 wall. The color is pale corneous-brown, or sometimes almost 

 clear corneous. There is no spiral striation. Two Cuban exam- 

 ples figured measure: Length 4.2, diam. 1.25 mm. Length 

 3.85, diam. 1.1, apert 1.3 mm. The figures do not well show 

 the heavy callus upon the colunella and lower part of the parietal 

 wall. 



This is a somewhat common and widely distributed species, 

 probably to be found throughout the Antilles. It was taken 

 many years ago in Princeton, N. J., no doubt imported with 

 West Indian plants. These specimens were reported as P. 

 acicula in Binney' s " Manual." It occurred also in St. Helena, 

 though whether it still survives there is unknown. 



The New Caledonian Geostilbia caledonica is in all probability 

 the same species, a colony having been derived from Guadaloupe 

 or some other Antillean source. At all events I am quite 



