DRYM.EUS, SOUTH AMERICAN. 221 



A specimen before me probably referable to D. cequatorianus as a 

 variety is a smaller, less conic than Mr. Smith's figure, the longitu- 

 ninal stripes are nearly regular instead of zig-zag. Whorls 5$ ; lip 

 pink outside and within. Alt. 22, diam. 11, alt. of aperture 12$ 

 mill. (See pi. 36, figs. 43, 44). 



D. RECEDENS (Pfeiffer). 



Shell compressed- umbilicate, ovate-subfusiform, thin, smooth ; 

 pale yellow painted with undulating, sub-interrupted brown streaks ; 

 spire exactly conical, apex acute ; whorls 6, nearly flat, the last 

 longer than the spire, receding and slightly attenuated at base ; 

 columella inflated, twisted. Aperture slightly oblique, oblong- 

 oval, angular above ; peristome thin, whitish, the right margin 

 rather widely expanded, columellar margin reflexed, dilated above. 



Alt, 27, diam. 12 mill. ; aperture 16 mill, long (Pfr.). 



Moyobamba, Eastern Peru. 



Bulimus recedens PFR., P. Z. S., 1863, p. 525 ; Monogr., vi, p. 37. 

 An unfigured species, said by Pfeiffer to be similar in form to B. 

 serratus. 



D. ISCLINATUS (Pfeiffer). PI. 35, fig. 33. 



Shell scarcely perforate, fusiform-oblong, rather solid, striate and 

 rugose, and sculptured with very fine spiral striae, a little shining, 

 whitish. Spire conic, rather acute; whorls 5*, a little convex, the 

 last two-thirds of the t)tal length, attenuated at base. Columella 

 callous, rather straightly receding. 



Aperture oblique, oval ; peristome simple, the right margin much 

 dilated below, expanded, columellar margin sub-adnate. Alt. 33- 

 34, diam. 12 mill.; aperture 21 mill, long, 13 wide, including peri- 

 stome (P/V.). 



U. S. of Colombia (Cuming Coll.). 



Bulimus inclinatus PFR., P. Z. S., 1861, p. 387, pi. 37, f. 3 ; Mon- 

 ogr. vi, p. 41. 



D. EURYSTOMUS (Philippi). PI. 41, figs. 24, 25. 



Shell narrowly perforate, oblong-subfusiform, striatulate, seen 

 under the lens to be grooved with very delicate, distant, transverse 

 lines ; very thin, hyaline. Spire turrited-conic, rather obtuse ; 

 whorls 6, rather flat, the last longer than the spire, subangular in 

 the middle ventrally, compressed around the perforation. Aperture 

 ovate ; columella compressed, lightly arcuate ; peristome thin, re- 



