DRYM.EUS, SOUTH AMERICAN. 273 



panded, the coluraellar margin reflexed above, subadnate. Length 

 33, diam. 10 mill. ; aperture 14 mill, long, 5 wide. (Higgins). 



Joudabamba, Peru. 



Bulimus (Otostomus) lamas HIGG., P. Z. S., 1868, p. 179, pi. 14, 

 f. 3, 3a. PFR., Monogr., viii, p. 166. 



As Pfeiffer remarks, this species seems from the figures to be very 

 much like trujillensis. 



D. SACHSEI (Albers). PL 47, figs. 19, 20, 21. 



Shell perforate, ovate-turrited, rather thin, nearly smooth, (irreg- 

 ularly striolate), shiningt; white, ornamented with blackish-chestnut 

 streaks, dotted or guttate with white. . Spire convex-conic, the apex 

 rather obtuse, corneous [or black-tipped]. Whorls 7, a little con- 

 vex, the last about three-sevenths the total length, tapering and 

 white at base. Aperture slightly oblique, oval-oblong, with a lilac 

 gleam inside [or dull purplish] ; peristome unexpanded, acute, rose- 

 colored ; the right margin lightly arcuate ; columellar margin 

 twisted, abruptly reflexed, dilated above, with a more or less distinct 

 oblique furrow where it joins the body-whorl. Alt. 29, diam. 13 ; 

 alt. of aperture 13, width nearly 7 mill. (Pfr). Alt. 27, diam. 

 12*, alt. of aperture 12 mill. 



Upper course of the Maranon River in Ecuador and Peru, from near 

 Jaen to the mouth of the Napo River. Tambillo (Stoltzmann), neigh- 

 borhood of Moyobamba, at about 870 meters alt. (Stu'bel), Peru; 

 Catamayo, prov. Loja, (Loxa\ Ecuador (Wolf.). 



Bulimus sachsei ALBERS, Malak. Bl. 1854, p. 30. PFR., 1. c., 

 1855, p. 159 (Mesembrinus) ; Monogr., iv, p. 484. LUBOMIRSKI, P. 

 Z. S., 1879, p. 725. Otostomus (Drymaus) sachsei MARTENS, Con- 

 chol. MittheiL, pp. 161,175, pi. 35, fig. 11, 12. ScnAKO,t.c., p. 209 

 (jaw and dentition). Mormus catamayensis MILLER, Malak. Bl. (n. 

 F.), i, p. 120, pi. 12, f. 4. Conf. DOHRN, Jahrb. D. M. Ges., vii, p. 

 88. Thaumastus sachsei MILLER, Malak. Bl., xxv, p. 193. COUSIN, 

 Bull. Soc. Zool. France, xii, 1887, p. 227. Conf. DOHRN, Jahrb. D. 

 M. Ges., vi, 1879, p. 189. ? Bulimus sporadicus REEVE, Conch. 

 Icon., pi. 49, f. 325 (not of Orbigny). 



Besides the ordinary form with black streaks profusely speckled 

 with white, there are paler, brown streaked specimens, and partial 

 albinos (fig. 19) in which the original pattern is scarcely recogniz- 

 able. The slight groove at the root of the columella is characteristic. 



18 



