NEOPETR^EUS. 165 



N. VADUM Pilsbry, n. sp. PI. 29, figs. 32, 33, 34. 



Shell deeply rimate, oblong turrited, solid and strong, blue-white, 

 somewhat shining, the whorls of spire rather strongly and subregu- 

 larly, obliquely wrinkle-striate, last whorl nearly smooth, seen under 

 the lens to be finely and sparsely malleated. Whorls fully 6i, the 

 earlier If subangular above and below, sculptured with fine delicate 

 vertical riblets, higher than the finer, closer and lower spirals be- 

 tween them ; 2J succeeding whorls flattened, acutely keeled basally, 

 excavated above the keel, which projects above the suture (fig. 33) ; 

 subsequent whorls not showing the keel, the last whorl oblong, con- 

 vex, the suture ascending at its termination. 



Aperture ovate, about half the length of the shell, deep brown 

 within, becoming somewhat purplish on the lip and columella. 

 Peristome rather broadly expanded, the margins converging, brown, 

 fading to purple and then to white at the outer edge ; columellar 

 margin subvertical ; columella purplish, passing above into a very 

 wide entering fold (fig. 34). 



Alt. 33, diam. 17 ; alt. of aperture 17 mill. 



Alt. 33, diam. 16; alt. of aperture 16 mill. 



Peru. 



The mamillar apex, keeled and wrinkled early whorls and 

 rounded last whorl, as well as the solid, calcareous texture, dark 

 aperture and absence of external color markings, are common to this 

 species and B.filiola; but that differs in the almost unexpanded lip, 

 curious columella, straight instead of ascending termination of the 

 suture, and much stouter form. 



N. FILIOLA (Pilsbry). PI. 30, figs. 5, 6, 7, 8. 



Shell narrowly umbilicate and rimate, ovate, solid and strong; 

 opaque and calcareous; whitish, flesh tinted below, blue-tinted on 

 the spire, the nepionic whorls pink on the sides, white above ; some- 

 what shining, very irregularly wrinkle-striate, with some short trans- 

 verse impressions, the early post-nepionic whorls more regularly 

 and obliquely wrinkled. Spire conic, If earlier whorls forming a 

 mamillar, projecting apex, flattened above, and sculptured with fine 

 vertical riblets which predominate a little over the finer and closer 

 spiral lirulse ; following two whorls flat, showing a slightly project- 

 ing keel above the suture (fig. 8), which is concealed on subsequent 

 whorls ; body-whorl oval, not deflected in front. Whorls 6f in all. 



Aperture ovate, subvertical, one-half the length of the shell, deep 



