60 STROPHOCHEILUS-THATJMASTUS. 



The entire surface of this shell is sculptured longitudinally with 

 very closely packed crinkled striae, (five.}. 



S. TARMENSIS Philippi. PL 24, figs. 66, 67, 68, 69, 70. 



Shell perforate, oblong-turrited, solid, very densely striatulate, 

 rufous-chestnut, sometimes with an obsolete band on the last whorl ; 

 whorls 6, slightly convex, the last three-sevenths the alt. ; apex 

 obtuse, suture profound, subcrenulated. 



Aperture pear-shaped-ovate; columella subplicate, oblique ; per- 

 istome unexpanded, slightly thickened, the columellar margin 

 dilated above, half closing the perforation ; callus joining the lip- 

 ends distinct. Alt. 28, diani nearly 13 ; aperture, alt. 13, width in- 

 side nearly 7 mill. (Phil.'). 



Oroya, not far from Tarma, Peru (Raimondi) ; Chanchamayo 

 (Isern). 



Bulimus tarmensis PHIL., Malak. Bl. xiv, p. 70, 1867. PFR., 

 Novit. Conch, p. 343, pi. 81, f. 9, 10; Monogr. vi, 87. HIDALGO, 

 Viaje al Pacif., Mol., p. 114, pi. 4, f. 8, 9. Bulimus alutaceus 

 var. MORELET, Ser. Conch, iii, p. 181, pi. 7, f. 5. 



Figures 68, 69 are typical ; fig. 70 is the form collected by the 

 Spanish expedition, and seems stumpier. Hidalgo says " very 

 densely striatulate and sometimes with inconspicuous, spaced, most 

 finely granulose spiral lines." The form figured by Morelet (figs. 66, 

 67) as a variety of B. alutaceus Rve. has been referred to tarmensis 

 by Hidalgo, I believe correctly. It is smaller than alutaceus, alt. 

 24, diam. 11 mill., with 5J whorls; dark red, or chestnut brown 

 more or less intense, sometimes with one or several bands, spiral 

 striae absent. 



S. PORPHYREUS Pfeiffer. PL 29, figs. 18, 19, 20, 21. 



Shell perforate or umbilicate, oblong-attenuated, solid. Dark 

 brown, with many narrow, irregular whitish streaks, often showing 

 obscurely a dark peripheral girdle edged with lighter on both sides. 

 Surface very rudely and irregularly wrinkled, the nepionic whorls 

 showing coarse separated irregular wrinkles more or less broken and 

 branching. Spire exserted, conic, the apex very obtuse. Whorls 

 7, but slightly convex. 



Aperture small, ovate, brown and whitish inside; peristome 

 white, slightly thickened, the basal lip a little expanded ; columella 



