DRTM^EUS, MEXICO AND CENTRAL AMERICA. 43 



Monogr. Helic. Vivent. vi, p. 42; Novit. Conch, iii, p. 417, pi. 95, 

 figs. 3-6 Bulimulus (Drymceus) chiapasensis FISCH. & CROSSE, 

 Miss. Sclent. Mex., Mollusca, i, p. 483. Bulimulus chiapasensis 

 STREBEL, Beitr. Mex. Land- und Siissw. -Conch., v, pp. 70-73, pi. 

 5, fig. 14 a,b,c-, pi. 6, fig. 13, 15, 16 ; pi. 12, fig. 19 a, b, c Buli- 

 mulus (Drymceus) delattrei, var. rf, f, FISCII. & CROSSE, loc. cit. pi. 20, 

 fig. 5, 6. Otostomus chiapensis v. MARTENS, Biol. Centr. Amer., 

 Moll., p. 205, pi. 12, f. 15. 



Dr. von Martens arranges the color-varieties thus: 



a. typicus: Uniform white (figs. 27, 30, 31). (Pfr. Novit. Conch., 

 fig. 5, 6; Fisch. & Crosse, loc. cit. fig. 6; Strebel, loc. cit. pi. 6, fig. 

 13; pi. 12, fig. 19 b.) 



E. Mexico: Cordova (Salle); Cerro de Palmas near Cordova (Ho'ge); 

 Orizaba (Berendt, Botteri); Coatepec (Quirozj. Central Mexico: 

 Cuautitlan (Strebel). S. Mexico: Cumbre de Manzanilla, in the State 

 of Chiapas (Ghiesbreght). 



b. quadrifasciatus. Whitish with four continuous brown bands. 

 (Fig. 32.) (Bulimulus chiapasensis, var. y, Fisch. & Crosse, loc. cit. 

 fig. 6 ; B. chiapasensis-delattrei, Strebel, loc. cit. fig. 19 a, c.) 



E.Mexico: Matlaquihahuitl, in the State of Vera Cruz (Salle); 

 Cerro de Plumas near Cordova (Ho'ge). 



c. nebulosus: clouded, the suture white, throat brown (fig. 33). 

 (Bulimulus chiapasensis, form D (part), Strebel, loc. cit. p. 72, pi. 6, 

 fig. 15, 16.) 



E. Mexico: Coatepec (Quiroz); Quitmstlan, between Coatepec and 

 the borders of the State of Puebla (Dona Estefania). Central Mexico ; 

 Cuautitlan (Strebel). 



D. CASTUS (Pfeiffer). PI. 9, figs. 42-53. 



Shell perforate or nearly closed, ovate-fusiform, rather thin, white 

 or whitish, often becoming pink or brown on the spire, and either 

 without markings or with three spiral bands, or spaced longitudinal 

 streaks of purplish-brown. Surface glossy, densely and regularly 

 spirally striate under a lens. Spire long, the apex rather obtuse, 

 with typical Drymceus sculpture, last whorl lengthened and graceful. 



Aperture large, white or marked inside ; peristome very broadly 

 expanded, flarin a, white or pinkish ; columellar margin narrowly re- 

 flexed, and with the parietal wall, pink in color. 



Alt. 34, diam. 15, length of aperture 18 mill, 



