66 DRYM^EUS, MEXICO AND CENTRAL AMERICA. 



by the transverse coalescence of blotches on longitudinal streaks, but 

 varying considerably in development of bands or streaks; spire conic, 

 rather acute. Whorls 6, slightly convex, the last slightly longer than 

 the spire. 



Aperture oblique, ovate; peristome thin, a trifle expanded, the col- 

 umellar margin dilated above, abruptly reflexed; columella narrow. 



Alt. 24, diam. 10J, length of aperture 13 mill. 



E. Mexico : Pacho, Molina de Pedreguera, Coatepec, Chirimoyo, 

 all near Jalapa, and Barranca de Mahuistlan, and San Jose Miahu- 

 atlan (Strebel); Jalapa (Hoge); Mirador (Berendt); Orizaba (Bot- 

 teri, Salle); Cordova (type locality, Salle, Hoge); Plantation Toxpa 

 (Tospan)^ near Cordova (Berendt), Atoyac (Hoge). 



Bulimus droueti PFR., P. Z. S., 1856, p. 319, pi. 35, f. 12; Monogr. 

 Helic. Vivent. iv, p. 399. Bulimulus (Scutalus) droueti FISCH. & 

 CROSSE, Miss. Scient. Mex., Mollusca, i. p. 533, pi. 23, figs. 9, 9a, 

 b. Bulimulus droueti STREBEL, Beitr. Mex. Land- und Siissw.- 

 Conch. iv, pi. 6, fig. 13 ; v, p. 77, pi. 6, fig. 6. (young); pi. 12, figs. 

 7a, b, c Bulimus sporlederi PFR., Malak. Blatt. xiii, p. 83 (1866); 

 Monogr. Helic. Vivent. vi, p. 112 Bulimulus (Scutalus) sporlederi 

 FISCH & CROSSE, Miss. Scient. Mex., Mollusca, i, p. 535, pi. 21, 

 figs. 5, 5a Bulimulus sporlederi STREBEL, Beitr. Mex. Land- und 

 Siissw.-Conch. iv, pi. 6, fig. 12 ; v, p. 78, pi. 12, fig. 9 ; pi. 13, fig. 10 

 (radula); pi. 14, fig. 18 A, B, C (anatomy) Otostomus (Scutalus) 

 sporlederi v. MART., Conch. Mittheil. ii. p. 193 Otostomus droueti 

 v. MART., Biologia, p. 218. 



The coloration described above is that of Pfeiffer's type, the spe- 

 cimen used being from Mirador, which is also the type locality of 

 sporlederi. Dr. von Martens enumerates the following color-forms. 



a: (Typical form, pi. 3, figs. 36, 37, 38, 43). Streaks and spiral 

 bands in combination. (Pfr. P. Z. S., 1856, pi. 35, fig. 12 : Fisch. 

 & Crosse, loc. cit. pi. 23, figs. 9, 9a; Strebel, loc. cit. iv, pi. 6, fig. 13; 

 v, pi. 12, fig. U.) 



1): Streaks rather numerous and wavy. (Strebel, loc. cit. iv, pi. 

 6, fig. 12; v, pi. 12, figs. 7, 7c.) 



c: (Var. sporlederi, pi. 3, figs. 40, 41, 42). Streaks fewer, 

 straight, oblique (Fischer & Crosse, loc. cit. pi. 23, fig. 95, droueti, 

 var. y.) 



" The vars. a and b have been procured together at Cordova by 

 Herr Hoge, the var. b only at Atoyac by the same collector. The 



