DRYM^EUS, MEXICO AND CENTRAL AMERICA. 51 



about equal in length to the spire, more convex, slightly tapering at 

 base. Columella lightly arcuate, lilac colored. Aperture slightly 

 oblique, acuminate-oval ; peristome simple, the right margin narrowly 

 expanded, columellar margin vaulted, reflexed. 



Alt. 31-32, diam. 13, length of aperture 16J mill. (Pfr.) 



S.Mexico: Chiapas (Ghiesbreght); Tlacolula (Hoge). 



Bulimus ghiesbreghti PFR., in Malak. Blatt. xiii, p. 82 (1866); 

 Novit. Conch, iii, p. 309, pi. 75, figs. 6, 7 ; Monogr. Helic. Vivent. 



vi, p. 46 Bulimulus (Scutalus) gMesbreghti FISCH. & CROSSE, 



Miss. Scient. Mex., Mollusca, i. p. 522, pi. 23, fig. 4 Bulimulus 

 ghiesbreghti Strebel, Beitr. Mex. Land- und Siissw.-Conch. v, p. 60, 



pi. 6, fig. 14 Otoftomus ghiesbreghti MART., Biol. Centr. Amer., 



Moll., p. 209, pi. 13, f. 5-10 (with varieties). 



The typical form of D. ghiesbreghti (pi. 15, figs. 32, 33), is rather 

 smooth, and has narrow brown streaks. Von Martens recognizes 

 the following varieties. 



Var. stolli Martens (pi. 1, figs. 72, 73, 76, 77, 78). More rugose. 



Bulimulus (Scutalus) ghiesbreghti FISCH. & CROSSE, loc. cit., p. 

 522, pi. 23, fig. 4a Bulimulus ghiesbreghti STREBEL, loc. cit. pi. 

 5, fig. 5. Bulimulus jonasi var. stolli MART., in Sitz.-Ber. Ges. 

 Naturf. Freunde Berl. 1886, p. 161 Otostomus g. var. stolli MART., 

 Biol. Centr. Amer. pi. 13, f. 5-8, 10. 



Central Guatemala : Llano of Quezaltenango, at an elevation of 

 from 6000 to 9000 feet above the sea, common, chiefly on Agave, 

 and on various shrubs (Stoll); Argieta, department of Solola, in the 

 " tierra fria " (Bocourt); Los JEncuentros, at an elevation of 8000 

 feet, at' Tecpam 7000 feet, also on the northern slope of the Volcan 

 de Agua, in the belt of tall forest-trees, at from 8000 to 9000 feet, 

 and at Antigua (Stoll). W. Guatemala: in the forest above the 

 Hacienda de Las Nubes, on the southern slope of Cerro Zunil 

 (Champion). 



Var. interstitialist Martens (pi. 1, fig. 75). Regular white or 

 brownish longitudinal ribs, the intervals tawny on the last whorl; 

 parietal wall of the aperture pale rose, columella white. 



Central Guatemala : Cumbre de San Martin, on the N. W. slope 

 of the Cordillera, at an elevation of 6000 feet (Stoll). 



Var. iodostylus Pfr. (pi. 1, figs. 79, 80). Sculpture less strong. 



Bulimus iodostylus PFR. P. Z. S., 1861, p. 23; Malak. Blatt, xi, 

 p. 13 (1864); Monogr. Helic. Vivent. vi, p. 48. ? Bulimulus 



