174 NEOPETR^SUS. 



I suppose this to be the variety /5, collected by Farris in prov. 

 Patas, and characterized by the single word " gracilior " in Mono- 

 graphia iv. The locality of the specimen figured is unknown. It 

 resembles D. patasensis in color pattern of the exterior. 



B. heterogyrus Philippi. Shell covered perforate (finally imper- 

 forate ?) oblong-fusiform, plicatulate, partly smooth, thin, whitish, 

 ornamented with brown flammules ; whorls 7, the earlier two very 

 smooth, mamillate, following 2-3 flat, with an elevated carina pro- 

 jecting above the suture, last two whorls moderately convex, with- 

 out trace of the carina ; last whorl the length of the spire, flesh- 

 colored. Aperture oblong or nearly half-ovate ; columella oblique, 

 straight, half the length of aperture ; peristome (imperfect) simple, 

 straight, thin, the columellar margin reflexed above, nearly closing 

 the umbilical chink. Alt. 36, diam. 17 mill. ; aperture 19 J mill, 

 long, 9 wide. (Phil.). 



Department of Libertad, Peru, between Sartimbamba and Chusgon, 

 in " la Sierra." 



Bulimus heterogyrus PHIL., Malak. Bl. xvi, 1869, p. 42. See 

 PFR., t. c., p. 90. 



One imperfect specimen, very singular in having the early whorls 

 keeled as in Helix elata, the later becoming wholly ecarinate. The 

 keeled whorls have stronger, more distant folds ; on the last whorl 

 these are to be seen at the suture but become obsolete below. There 

 are also transverse, decussating lines. Pfeiffer writes that the figure 

 of this species sent by Philippi is so similar to the upper portion of 

 B. altoperuvianus that he scarcely doubts their identity. There is 

 indeed little in the description to indicate a distinct species, unless 

 the smaller size coupled with the number of whorls be such a 

 feature. 



N. SOWERBYI (Pfeiffer). PL 29, fig. 31. 



Shell perforate, ovate-conic, thin, rather smooth ; whitish, orna- 

 mented with oblique chestnut streaks forming white pyramidal and 

 rhomboidal spots. Spire conic, acute. Whorls 6, a trifle convex, 

 the last as long as the spire, pale in the middle, with one chestnut 

 band on the tapering base. Columella a little receding. 



Aperture oblong-oval ; peristome simple, unexpanded ; columellar 

 margin angularly, widely reflexed, flat. Alt. 22. diam. 10 ; alt. of 

 aperture 11 j- mill. (Pfr.~). 



Andes of Columbia. 



