210 DRYM^US, SOUTH AMERICAN. 



Aperture vertical, somewhat wide, subovate, livid white within, 

 the streaks showing through ; peristome simple, orange-fulvous, 

 expanded and a little reflexed throughout, the columellar margin 

 with a slight twist or fold ; right margin buff-whitish near the outer 

 edge. Alt. 36, diam. 15 mill.; aperture 18 mill, long, 12 wide 

 ( Crosse). 



Napo, Ecuador (Martinez). 



Bulimus membielinus CROSSE, Journ. de Conchyl., xv, 1867, p. 

 445 ; 1868, p. 99, pi. 1, f. 2. PFR., Monogr., vi, p. 39. HIDALGO, 

 Journ. de Conch., 1870, p. 47 ; Viaje al Pacifico, p. 72, pi. 4, f. 6, 7. 



Compared with D. glaucostoma Alb. by Crosse, on account of the 

 white punctulation ; but it is probably more nearly allied to the 

 white dotted species of the same region. 



D. HIDALGOI (daCosta). PI. 50, fig. 84. 



Shell ovate-fusiform, compressedly umbilicate, rather thick ; 

 whorls 7, convex, smooth or with spiral incised lines under the lens ; 

 suture impressed. White, streaked longitudinally with blue-black. 

 Columella a little twisted and reflexed ; outer lip expanded and re- 

 flexed, margins joined by a purplish callus. Alt. 39, diam. 13, 

 length of aperture with peristome 18, width 12 mill. (daCosta). 



Ecuador. 



Bulimulus (Drymceus) Hidalgoi DACosTA, Proc. Malac. Soc. Lon- 

 don, iii, p. 81, pi. 6, f. 2 (July, 1898). 



This species bears a resemblance to both B. felix Pfr. and B. 

 membielinus Crosse, but differs from each in form and sculpture. 



(da Costa). 



D. SIGNIFER (Pfeiffer). 



Shell perforate, subfusiform-oblong, thin, closely and lightly 

 plicate-striate ; whitish, irregularly marked with reddish serrate 

 streaks. Spire inflated conic, rather acute. Whorls 6, the upper a 

 little flattened, the penultimate convex, last whorl about as long as 

 the spire, attenuated at base. Columella twisted, receding. Aper- 

 ture scarcely oblique, oblong ; peristome simple, the right margin 

 rather widely expanded, columellar margin dilated, abruptly re- 

 flexed, broad. Alt. 33, diam. 13 mill. ; aperture 18 mill, long, in- 

 side 7 wide (Pfr.). 



Venezuela? (Cuming Coll.). 



