DRYM^EUS, SOUTH AMERICAN. 197 



Somewhat allied to D. hygrohylceus, but differing in the color- 

 scheme, more lengthened form, smoother surface and shorter aper- 

 ture. The peristome is merely spreading instead of being convex 

 and recurved. Reeve's figures are quoted with doubt, for while f. 

 27 la may possibly be a decolored example of xanthostoma, f. 271b 

 looks much like D. trigonostoma. 



D. ZOOGRAPHICUS (d'Orbigny). PI. 38, figs. 6, 7, 8. 



Shell long, a little swollen, not umbilicate, thin, fragile, translu- 

 cent, smooth and even glossy, showing some inconspicuous growth- 

 lines. Slightly soiled white with longitudinal, irregular flammules 

 of blackish brown, zig-zag or festooned, giving the appearance of 

 two interrupted spiral bands. Spire a little swollen, oblique, obtuse 

 at apex, composed of 6 moderately convex whorls, separated by a 

 shallow, even suture. Aperture wide, oblong, oblique; peristome 

 very wide, much expanded, thin, sharp and reflexed ; columella 

 thick, twisted. Margins of aperture and base of the columella of a 

 quite dark purple, but this tint does not extend upon the lip, which 

 is white. Alt. 32, diam. 14 mill. ( Orb.'). 



Northeastern slope of the Bolivian Cordillera, not far from Tutu- 

 lima, at the bottom of a ravine through which the Rio Altamachi 

 flows (Orb.) ; Valley of Santa Anna, Peru (Angrand). 



Helix zoographica ORB., Mag. de Zool., 1835, p. 19. Bulimus 

 zoographicus ORB., Voy. Amer. Merid., p. 313, pi. 40, f. 6, 7. PFR., 

 Monogr., ii, p. 104 ; viii, p. 67. MORELET, Series Conchyliologi- 

 ques, iii, p. 209. HUPE in Castelnau's Exped., p. 50, pi. 6, f. 5. 

 REEVE, Conch. Icon., pi. 70, f. 509. Bulimulus zoographicus BECK, 

 Index, p. 64. 



An imperforate species with zig-zag stripes and two or three inter- 

 rupted bands. Morelet remarks that the specimens collected by 

 Angrand in Peru seem to unite beyerleanus Hupe as a variety to 

 zoographicus. He gives the following color varieties : 



a. Violaceous, painted with angularly bent streaks and spots of 

 buff. 



b. Buff, with zig-zag brown or corneous stripes. 



c. Buff, flamed lengthwise with violaceous. 



d. Pale tawny. 



D. BEYERLEANUS (Hupe). PI. 38, figs. 4, 5. 



Shell elongate, subfusiform, thin, very glossy, smooth ; buff, ele- 

 gantly banded with brownish-black spots or lines, which are longi- 



