144 BULIMULUS. 



B. UMBRATICUS (Reeve). Vol. xi, p. 52. 



Von Martens, Biologia Centr. Amer., p. 251, suggests that this 

 may be a Stenogyroid form. 



B. DYSONI (Pfr.). Vol. xi, p. 56. 



My identification of Yucatan specimens as B. dysoni (Proc. Acad. 

 N. S. Phila. 1891, p. 315) was erroneous. There is no authentic 

 record of the species from Yucatan. 



Mr. Herbert H. Smith collected specimens in the Santa Marta 

 range of Colombia, in dry forest, on shrubs and herbage, about 4 

 miles north of Bonda. 



B. CACTICOLUS (Reeve). 



Lives on Cacti, eating into them, according to Reeve. Moritz 

 collected it at Puerto Cabello, and Ernst took a small form, var. 

 minor Martens, at Caracas. In this the length is not over 15^ mill., 

 the aperture comparatively smaller, not half the total length (Bin- 

 nenmoll. Venezuela's, p. 187). 



B. HACHENSIS (Reeve). Vol. XII, pi. 12, fig. 20. 



Shell perforate, oblong-turreted, rather solid, nearly smooth, shin- 

 ing, buff. Spire long, acute. Whorls 7, but slightly convex, the 

 last about two-fifths the total length, a trifle compressed below. 

 Columella somewhat straightened. Aperture little oblique, truncate- 

 oval; peristome simple, unexpanded, the columellar margin broadly 

 reflexed above. Alt. 27, diam. 10^, length of aperture 10^ mill. 

 (Pfr.). Banks of the Rio ffacha, Guatemala (Rve.). 



Bulimus hachensis RVE., Conch. Icon. pi. 85, f. 627 (Feb. 1850). 

 PFR., Monogr. iii, p. 421. Conf. von MARTENS, Biol. Centr. 

 Amer., p. 237. 



" A delicate yellow shell of a peculiarly pyramidal form." 

 " Pinkish yellow within and without " (Rve.). 



This may be a Drymaus, but on account of its similarity to B. 

 krebsianus I leave it in Bulimulus. There is a Rio Hacha in 

 northern Colombia, and I think with von Martens that the locality 

 " Guatemala " is an error. 



B. INDISTINCTUS Pfeiffer. (Vol. xi, pi. 45, fig. 28.) 



Shell umbilicate, ovate-conic, solid, rather smooth, shining ; white, 

 indistinctly ornamented with two yellowish interrupted bands. Spire 



