68 DRYM^EUS, MEXICO AND CENTRAL AMERICA. 



B. heynemanni and B. inglorius, and after having examined a con- 

 siderable number of specimens collected by Herr Hdge, I quite agree 

 with him." (Martens.) 

 Var. heynemanni (Pfr.). PI. 3, figs. 44, 45, 47-52. 



Boldly marked with wide, irregular black-brown stripes. 



E.Mexico: Orizaba (Botteri). Central Mexico : Tecomavaca, in 

 the State of Puebla, S. E. of Tehuacan, Cactus- and Mimosa-region 

 (Hoge). S. Mexico : Cerro de San Antonio de la Cal, in the State 

 of Oaxaca, on shrubs (Boucard); Tlacolula, in the same State, copi- 

 ously (Hoge). 



Bulimus heynemanni PFR., Malak. Blatt., xiii, p. 83 (1866) ; 

 Monogr. Helic. Vivent., vi, p. 110; Novit. Conch., iii, p. 423, pi. 96, 

 fig. 3, 4 Bulimulus (Scutalus) heynemanni FISCH. & CROSSE, Miss. 

 Scient. Mex., Mollusca, i, p. 527. Bulimulus heynemanni STREBEL, 

 Beitr. Mex. Land- und Siissw. Conch, v, p. 68, pi. 6, fig. 7 Bidi- 

 muhis (Scutalus) inglorius FISCH. & CROSSE, loc. cit., p. 538, pi. 

 21, fig. 9, 9a (not of Reeve). 0. inglorious var. heynemanni MAR- 

 TENS, Biologia, p. 220, pi. 14, f. 1, la, 4, 4a. 



GROUP OF D. TRIPICTUS. 

 D. IRAZUENSIS (Angas). PI. 6, figs. 16-20, 24, 25. 



Shell somewhat elongately ovate, rimate, moderately thin, longi- 

 tudinally irregularly striated, shining, more or less longitudinally 

 striped or freckled with black, and ornamented with numerous small 

 white spots ; whorls 6, rather convex. Spire a little shorter than the 

 aperture. Aperture oblong-ovate; lip thin, simple, tinged inside with 

 rose color. 



Alt. 25, diam. 12^ mill. (Angas.) 



Central Costa Rica : Volcan de Irazu, on low aromatic bushes on 

 the eastern slope (Boucard); Tierra Blanca, on the southern slope of 

 the Volcan de Irazu, at an elevation of 1800 metres above the sea 

 (Biolley). 



Bulimus irazuensis ANGAS, P. Z. S., 1878, p. 73, pi. 5, fig. 17-20. 

 Otostomus irazuensis VON MART., Biol. Centr. Amer., p. 224, pi. 14, 

 f. 12, 12a, 13, 13a. 



The following principal color-patterns occur : 



a. More or less numerous zigzag stripes (figs. 17, 18). 



b. Pale brown, sprinkled with white dots (figs. 16, 24, 25). 



c. Three rather wide brown, white-spotted bands (figs. 19, 20). 



