194 DRYM^US, SOUTH AMERICAN. 



D. MARMARINUS (d'Orbigny). PI. 37, figs. 5, 6. 



Shell oblong, ventricose, thick, umbilicate ; smoothish, of a reddish- 

 brown color, clouded with browner spots and encircled with four 

 interrupted bands and irregular longitudinal zig-zag flames, the 

 markings disappearing toward the apex ; spire somewhat inflated, 

 the apex subacute ; whorls 7, flattened, suture shallow. Aperture 

 oblong, sub-auriculate ; lip white, thin, widely reflexed ; columella 

 twisted, flat. Alt. 42, diam. 18 mill. (Orb."). 



Slopes of the Rio de Meguilla, prov. Yungas, Bolivia, under dead 

 leaves and stones in the woods (Orb.). 



Helix marmarina ORB., Mag. de Zool., 1835, p. 18. Bulimus 

 marmarinus ORB., Voy. Amer. Merid., p. 310, pi. 39, f. 11, 12. PFR., 

 Monogr.. ii, p. 59 : iii, p. 331 ; iv, p. 389 ; vi, p. 35. REEVE, Conch. 

 Icon., pi. 41, f. 255. Bulimulus marmarinus BECK, Index, p. 63. 

 B. marmorinus ALB. 



More lengthened than D. brachystoma, with smaller aperture. 



D. HYGROHYL^US (d'Orbigny). PL 37, figs. 9, 10, 11. 



Shell openly rirnate, fusiform, with conic spire, rather thick and 

 strong; dirty white or slightly yellowish, with numerous festooned 

 longitudinal stripes of purplish-brown, the festoons sometimes par- 

 tially coalescent into 5 imperfect spiral bands, and on the spire giv- 

 ing place to oblong spots forming interrupted bands ; surface some- 

 what shining, longitudinally finely wrinkled, the wrinkles by inter- 

 ruption arid coalescence forming a fine malleation or reticulate 

 pattern on the latter two whorls; general outlines of spire slightly 

 convex. Whorls 6* (or 7) quite convex, the latter half of the last 

 not descending, base well rounded. 



Aperture oblong, half the shell's length or somewhat more, 

 slightly oblique, showing the external markings within ; peristome 

 white, broadly reflexed throughout; columella appearing straight 

 from in front, but entering with a rather strong spiral twist. 



Alt. 36, diam. 18 mill.; aperture 20 mill, long (specimen). 



Alt. 45, diam. 19 mill. (Orb.). 



Eastern part of the province Santa Cruz de la Sierra, Bolivia, 

 throughout the forests northward from Chiquitos, on trees, burying 

 itself in the earth in dry weather. 



Helix hygrohylvea ORB., Mag. de Zool., 1835, p. 18. Bulimus hy- 

 grohylceus ORB., Voy. Amer. Merid., p. 311, pi. 40, f. 3-5. PFR., 

 Monogr., ii, 59 ; iii, 332 ; iv, 394 ; vi, 40. REEVE, Conch. Icon., pi. 



