58 STROPHOCHEILUS-THAUMASTUS. 



peristome unexpanded, slightly thickened, brown-edged ; parietal 

 callus very thin ; right margin a little arcuate, columellar margin 

 rather reflexed, half closing the perforation. 



Alt. 50, diam. 20 mill. (Hidalgo). 



La Oroya and Chanchamayo (Isern) ; Huancaya (Raimondi, 

 large form). 



Bulimus iserni PHILIPPI, Malak. Bl., xiv, 1867, p. 75. PFR., 

 Novit. Conch., p. 338, pi. 80, f. 16-18 ; Monographia, vi, p. 121. 

 HIDALGO, Viaje al Pacifico, Mol., p. 67, pi. 6, f. 6, 7. 



Smoother and more shining than S. bifasciatus with wider light 

 bands. A form from Huancaya is larger, alt. 56, diam. 28 mill., 

 the bands ferrugineous-yellow (fig. 13). 



S. JELSKII Lubomirski. PI. 27, figs. 95, 96. 



Shell subperforate, elongate-ovate, the apex obtuse, striated, trans- 

 lucent, deep tawny with four brown bands, the upper and lower 

 wide, median and sutural very narrow ; suture irregularly crenulate 

 plicate. Whorls 6, slightly convex, the last about equalling the 

 spire ; columella slightly folded, somewhat twisted. 



Aperture oval, oblong, whitish inside ; peristome simple, the ends 

 joined by a very thin callus ; right margin unexpanded, columellar 

 margin dilated, with a chink behind it, livid. Alt. 35, diam. 15, 

 aperture, alt. 17, width 8 mill. (Lub.). 



Amable Maria, near Tarma, Peru (Jelski). 



Bulimus (Orphnus) jelskii LUB., P. Z. S., 1879, p. 722, pi. 56, f. 

 1,2. 



Prince Lubomirski's description of the coloration does not agree 

 very well with his figures, which are copied on our plate. One 

 specimen only was collected. 



S. BIT^NIATUS Nyst. PI. 29, figs. 15, 16. 



Shell perforate, oblong or ovate-turrited, rather solid, a little 

 shining, sculptured with very close, somewhat undulating longitudi- 

 nal strise. Under a very thin pale olive cuticle, it is chestnut col- 

 ored, with a rather narrow whitish band at the suture and another 

 below the middle of the body whorl, margined below with blackish- 

 chestnut. Spire long-conoid, the apex obtuse, subexcavated ; 

 suture a little wrinkled. Whorls 7, rather flat, the earlier 2 seen 

 under a lens to have strong, somewhat spaced keels and folds above ; 

 last whorl a little convex, obliquely descending. 



