BULIMULUS-BOSTRYX-LISSOACME. 181 



Aperture yellow-reddish within, oval ; outer lip of peristome thin, 

 fragile and acute, inserted above at the edge of a slight keel ; col- 

 umellar margin nearly straight, thin and fragile, dilated and nearly 

 closing the umbilicus; a slight channel at base; parietal callus 

 moderate. Alt. 25, diam. 9-10; length of aperture 10, width 5 

 mill. 



Mt. Hacu, between Achapallus and the Sula River, Alaun district 

 of the province Chimborazo, Ecuador, 2800 meters alt., under stones 

 and at the roots of cacti (Cousin). 



Thaumastus alausiensis Cousin, Bull. Soc. Zool. France, xii, 1887, 

 p. 228, pi. 4, f. 13. 



B. DEPSTUS Reeve. PI. 47, fig. 85. 



Shell perforate, ovate-turrited, rather solid, plicatulate ; tawny, 

 irregularly ornamented with chestnut streaks. Spire conic, rather 

 obtuse. Whorls 7, convex, closely plicate at the sutures ; the last 

 whorl about three-sevenths the total length, somewhat compressed 

 toward the narrow perforation. Columella subvertical, slightly 

 arcuate. Aperture slightly oblique, oblong ; peristome simple, the 

 right margin spreading, columellar margin liver-colored, vaulted 

 and reflexed above. Alt. 19, diam. 10; aperture 85 mill, long, 5 

 wide. (P/r.). 



Chachapoyas, Peruvian plateau (Lobb). 



Bulimus depstus RVE., P. Z. S., 1849, p. 97 ; Conch. Icon., pi. 73, 

 no. 524, f. 525. PFR., Mouogr., iii, p. 428. 



B. RECONDITUS Reeve. PI. 47, fig. 86. 



Shell perforate, ovate-conic, rather solid, nearly smooth ; whitish 

 clouded with gray, and ornamented with short streaks and dotted 

 longitudinal lines of chestnut. Spire elongate-conic, somewhat acute. 

 Whorls 7, a little convex, the last shorter than the spire, a little 

 swollen below the sutures, rotund at base. Columella very lightly 

 arcuate. Aperture oblique, oblong-oval; peristome simple, unex- 

 panded, the columellar margin shortly reflexed above. Alt. 20, 

 diam. 9j ; aperture, length 10, width 5 mill. (Pfr.). 



Habitat unknown. 



Bulimus reconditxs RVE., Conch. Icon., pi. 76, f. 549 (Aug., 1849). 

 -PFR., Monogr., iii, p. 422 ; iv, p. 483 ; vi, p. 129. 



The " dark longitudinal dashes and finely dotted lines" are its more 

 prominent feature. Pfeiffer has described a variety from Peru as 



