DRYM^US, SOUTH AMERICAN. 20& 



Eastern slope of the Bolivian Andes in the province of Yungas, 

 principally on the moist wooded mountains near the villages of 

 Yanacache and Chupe (Orb.}. 



Helix lophoica ORB., Mag. de Zool., 1835, p. 19. Bulimus lopho- 

 icus ORB., Voy. Amer. Merid., p. 316, pi. 40, f. 14, 15. PFR.,MOD- 

 ogr., ii, 60 ; iii, 322 ; iv, 402 ; vi, 49. Bulinus lophoicus Sow., 

 Conch. Illustr., f. 65. Bidimulus lophoicus BECK, Index, p. 64. 



Closely allied, writes d'Orbigny, to B. yungasensis, but easy to 

 distinguish by the longer, less swollen spire, straight instead of ob- 

 lique, and narrower aperture, more twisted columella, and finally 

 by the lineolation, roseate tint, and want of brown spots. 



D. FERIATUS (Reeve). PI. 34, fig. 10. 



Shell slightly perforate, oblong-fusiform, solid, rugulose-striate ; 

 whitish, irregularly marked with brown streaks, which are generally 

 dotted with white. Spire conic, rather acute; whorls 5*, a little 

 convex, the last a little longer than the spire, attenuated at base, 

 subcompressed ; columella subvertical, somewhat straightened. 

 Aperture nearly vertical, acuminate-oblong ; peristome narrowly 

 expanded, the right margin spreading, columellar margin dilated 

 above, subappressed. Alt. 28, diam. 11 mill.; aperture 14 mill., 

 long. (P/r.). 



Habitat unknown^ 



Bulimus feriatus REEVE, Conch. Icon., pi. 48, f. '314. PFR.,. 

 Monogr., iii, p. 323. 



D. YUNGASENSIS (d'Orbigny). PI. 36, fig. 34, 35. 



Shell elongated, a little swollen, very distinctly umbilicated, thin^ 

 fragile ; the surface irregularly malleated and rugose ; grayish-rose 

 with clouds of brown and wide brown longitudinal markings, form- 

 ing three interrupted brown bands. Spire long, swollen, very ob- 

 tuse at the apex, composed of 6 convex whorls separated by a deep 

 suture, the last whorl very large and oblique. Aperture oblong, a 

 little oblique, brownish-purple within ; peristome yellowish, thin, 

 expanded, but not w r ide nor strongly reflexed; columella wide, flat- 

 tened, arcuate, but not twisted. Alt. 35, diam. 13 mill. (Orb.). 



Eastern slope of the Bolivian Andes, on the Rio de Meguilla near 

 its confluence with the Rio de la Paz, under dead leaves and stones 

 (Orb.). 



