244 DRYM^US, SOUTH AMERICAN. 



Aperture oval, equal to the spire; outer lip flattened and expanded 

 at the base. Alt. 1 inch 3 lines, diam. 62 lines. (Angas). 



Ecuador. 



Bulimus (Otostomus) quadrifasciatus ANGAS, P. Z. S., 1878, p. 

 312, pi. 18, f. 2, 3. 



D. NAPO (Angas). PI. 41, figs. 19, 20. 



Shell rimate, ovately fusiform, moderately solid, shining, very 

 finely and irregularly striated ; pale fawn color with a narrow white 

 band next below the suture and a similar white band surrounding 

 the perforation. Spire sharply conical, somewhat obtuse at the 

 apex. Whorls 6, slightly convex ; aperture ovate, same length as 

 the spire ; outer lip expanded and flattened at the base, white be- 

 hind, bordered by a narrow suffused orange band. Alt. 1 inch 3 

 lines, diam. 5 lines. (Angas). 



Ecuador. 



Bulimus (Otostomus) napo ANGAS, P. Z. S., 1878, p. 312, pi. 18, 

 f. 4, 5. 



Group of D. bolivianus. 



D. BOLIVIANUS (Pfeiffer). PI. 43, fig. 66. 



Shell perforate, oblong- turrited, decussated by most minute im- 

 pressed lines, visible under a lens, shining ; whitish-red, ornamented 

 with somewhat interrupted wide brown bands ; spire turrited, the 

 apex acute, red. Whorls 7, flat, the last a little convex, about four- 

 ninths the total length of shell. Columella with a twisted fold, 

 rose colored. Aperture oval-oblong, colored within like the out- 

 side ; peristome simple, the right margin narrowly expanded, col- 

 umellar margin much dilated, reflexed, excavated, nearly closing 

 the chink-like perforation. Alt. 33, diam. 13 mill. ; aperture 16 

 mill, long, 7 wide. (P/r.). 



" Merida, Bolivian Andes." 



Bulimus bolivianus PFR., P. Z. S., 1846, p. 34; Monogr., ii, p. 

 105. REEVE, Conch. Icon., pi. 81, f. 599. 



D. SUBINTERRUPTUS (Pfeiffer). PI. 41, figs. 34, 35. 



Shell perforate, subfusiform-oblong, rather thin, smooth, seen to 

 be spirally striated under the lens, a little shining ; whitish, with 

 five wide, somewhat interrupted light reddish bands. Spire long- 

 conic, acute; suture but little impressed, Whorls 6, rather flat, the 



