42 DRYM^EUS, MEXICO AND CENTRAL AMERICA. 



Normal form. Sculpture strong; aperture about ^ the length of the 

 shell ; large (length about 40 mill.). 



a. (Fig. 20.) Pale lilac, with a few narrow brownish streaks. 

 (Pfr., Monogr. ii, p. 56, form a; REEVE, loc. cit. fig. 211 c; Des- 

 hayes, loc. cit. p. 48, troisieme variete.) 



N. Guatemala: Vera Paz. (by error " Vera Cruz" in Mono- 

 graphia); Ooban (Salvin, Bocourt). Central Guatemala: Depart- 

 ment of Salama (Morelet); San Geronimo near Salama (Champion). 



b. (Figs. 21-24). Pale lilac, with interrupted bluish bands (Pfr. 

 Monogr. Helic. Vivent. ii. p. 56, form /?, and in Philippi, loc. cit. 

 middle fig.; Reeve, loc. cit. fig. 211 b; Deshayes, loc. cit. pi. 111. 

 fig. 12, 13; Fisch. & Crosse, loc. cit. p. 481 ; Martens, fig. 11). 



North Guatemala: Vera Paz (Delattre). Central Guatemala: 

 San Geronimo (Champion). 



c. (Figs. 15, 16). Uniform straw colored or whitish, the columella 

 violaceous. (Pfr. Monogr. Helic. Vivent. ii, p. 56, form y, and in 

 Philippi, loc. cit. right fig.; Reeve, loc. cit. fig. 21 la; Deshayes, loc. 

 cit. pi. 149, figs. 12, 13 ; Martens, fig. 12). 



North Guatemala: Vera Paz (Delattre); Coban (Salvin, Bocourt, 

 Conradt). Nicaragua (Janson). 



Var. hiabundus Martens. Smoother, aperture about ^ the length 

 of shell ; small (length about 30 mill.). 



d. White, with 3-5 wide purple-brown bands (fig. 17-19). 



e. uniform white (fig. 28). 



W. Guatemala: Cerfo Zunil (Champion). 



D. CHIAPASENSIS (Pfeiffer). PL 8, figs. 27, 29-33. 



Shell narrowly perforate, ovate-conic, rather solid, striate and de- 

 cussated by very fine spiral striaB ; dull whitish, the spire conic with 

 slightly convex outlines, apex rather acute, suture lightly impressed, 

 very finely serrate. Whorls 5^, a little convex, the last longer than 

 the spire, ascending slightly in front, subcompressed at base. Colu- 

 mella thread-like, slightly arcuate. Aperture oblique, oval ; shining 

 white inside ; peristome simple, the outer margin strongly dilated 

 below, expanded ; columellar margin dilated above. Alt. 35, diam. 

 14, length of aperture 21 mill. (Pfr.} 



States of Chiapas and Vera Cruz, Mexico. 



Bulimw chiapasensis PFR. in Malak, Blatt. xiii, p. 81 (1866); 



