.DRYM^EUS, SOUTH AMERICAN. 227 



somewhat twisted, vertical. Aperture oblong, sinuously effuse at 

 base, reddish within ; peristome thickened, broadly expanded, 

 roseate, the terminations joined by a wide, deep rose colored callus ; 

 columellar margin receding, as though truncate, at base. Alt. 70, 



diam. 29 mill. (P/V.). 



Ambo, near Huanuco, Peru. 



Bulinus crichtoni BROD., P. Z. S., 1836, p. 44. SOWERBY, Conch. 

 Illustr., f. 60. Bulimus crichtoni REEVE, Conch. Syst., ii, pi. 173, f. 

 4 ; Conch. Icon., pi. 39, f. 240. PFR., Monogr., ii, p. 28. Otostomus 

 crichtoni H. ADAMS, P. Z. S., 1866, p. 442. 



" The apex of the shell under description, the only specimen I 

 ever saw, is broken. It will be observed that the specimen is 

 notched at the base, but I suspect that this arises from accidental 

 distortion " (Broderip). 



A second specimen, collected by Bartlett in eastern Peru, is re- 

 ported by H. Adams. May be a Porphyrobaphe. 



D. NARCISSUS (Albers). PL 29, figs. 29, 30. 



Shell profoundly and compressed umbilicate, turrited-oblong, 

 rather solid and somewhat smooth, very minutely spirally striated 

 under the lens, a little shining, chalky. Spire couvex-turrited, the 

 apex acute. Whorls 6J, the upper flat, latter two -convex, the last 

 shorter than the spire, somewhat roughened, ascending in front, 

 somewhat compressed at base. Columella folded above. 



Aperture subvertical, oblong, purple-violaceous inside ; peristome 

 vurple, inwardly blackish, the right margin broadly expanded, 

 columellar margin much dilated, separated from the preceding 

 whorl by a groove at its insertion, sinuously spreading, a little re- 

 flexed. Alt. 36, diam. 14 mill.; aperture with peristome 18 mill. 



long, 12* wide (P/r.). 



U. S. of Colombia. 



Bulimus narcissus ALBERS, Malak. Bl., 1854, p. 217. PFR., 

 Monogr., iv, p. 384; Novit, Conch., i, p. 33, pi. 9, f. 10, 11. 



Somewhat like Neopetrceus vadum Pils. in appearance, but that 

 species has keeled upper whorls, no groove at root of the columella, 

 no minute spiral striation, and a differently colored mouth and lip. 

 Pfeiffer considers narcissus near to D. lilacinus Reeve. 



D. EXCORIATUS (Pfeiffer). 



Shell openly umbilicated, ovate-acuminate, rather thin, striatu- 

 late, under the lens punctulate, not shining, flesh colored. Spire 



