76 DRYM^EUS, MEXICO AND CENTRAL AMERICA. 



Alt. 28, diam. 14, length of aperture 13 mill, (from fig.) 



N. W. Mexico : Sinaloa (Tryon). Mexico, without nearer indica- 

 tion of locality (Reeve). 



Bulimus mexicanus (Lamarck), REEVE, Conch. Icon, v, Bulimus, 

 pi. 40, fig. 244 Drymceus mexicanus (Lamarck), TRYON, Am. Journ. 

 Conch, iii, p. 168, pi. 9 (13), fig. 5 (copy from Reeve) (1867). Not 

 B. mexicanus Lam., see vol. xi, p. 291. Bulimulus (Thaumastus) 

 tryoni, PISCH. & CROSSE, Miss. Sclent. Mex., Mollusca, i, p. 565, 

 and v. pochutlensis, pi. 24, f. 3, 3a. Otostomus tryoni MARTENS, 

 Biologia, p. 232. 



A somewhat doubtful species, based upon Reeve's figure of "B. 

 mexicanus" I do not know where the specimens are upon which 

 Tryon based the locality " Cinaloa." It seems to be near 1). emeus 

 Say. 



Var. POCHUTLENSIS Crosse & Fischer. PI. 3, figs. 54, 55. 



Encircled by brown, white and pale tawny bands ; peristome 

 whitish-brown. 



Alt. 24, diam. 11^ mill. (C. & F.) 



W. Mexico: Pochutla, near Chilapa, in the State of Guerrero (Salle). 



GROUP OF D. SULPHUREUS. 

 D. SULPHUREUS (Pfeiffer). PI. 4, figs. 65, 66, 67, 68. 



Shell perforate, ovate-conic, thin, somewhat translucent, pale sul- 

 phur colored or (probably by exposure to light) white. Surface 

 glossy, with slight growth striae and fine, regular engraved spiral 

 lines. Spire lengthened-conic, apex rather obtuse. Whorls 5|-6 

 (6^ according to Pfr.), but slightly convex, the last convex. Aper- 

 ture decidedly oblique, ovate; peristome slightly and narrowly ex- 

 panded at the edge, the columellar margin shortly reflexed above, im- 

 pressed at its insertion ; columella straight above. 



Alt. 29|, diam. 15, length of aperture 14^ mill. 



Alt. 28, diam. 14, length of aperture 13^ mill. 



Central Mexico : near the city of Mexico (Hahn). E. Mexico : 

 Consolapa and Soncoantla, both near Jalapa (Strebel) ; Mirador 

 (Strebel); Atoyac and Orizaba (Hoge); Cordova (Salle); S. E. Mex- 

 ico: Teapa in Tabasco (H. H. Smith). N. Guatemala: Cubilgmtz, 

 north of Coban, in the dense forests of Vera Paz, drainage into the 

 Rio de la Pasion (Champion); Chiacam^ near Lanquin, on the Ca- 



