ODOMTOSTOMUS. 77 



Argentina : Cordova (Pfr.) ; Cordoba de Tuouman, under stones, 

 in abundance (Paz) ; western slope of the Sierra de Cordova etc. 

 (Doering). 



Bulimus charpentieri Grateloup in Hit., PFR., Zeitschr. f. Malak. 

 1850, p. 14; Conchyl. Cab. p. 143, pi. 45, f. 14, 15 ; Monogr. iii, p. 



369 ; iv, 436 ; vi, 76 ; viii, 609 HIDALGO, Moluscos del Viaje al 



Pacifico, p. 81 ; Journ. de Conchyl. 1870, p. 52. 0. charpentieri 

 DOERING, Periodico Zoologico i, pt. 3, p. 188. 



This species is allied to 0. kuhnltoltzianus, but it tapers more, has 

 less pronounced sculpture, etc. Fig. 77 was drawn from a coarsely 

 striate specimen. Two before me measure : length 17, diam. 5^, 

 aperture 5 mill., and 18, 5^, 5 mill. In one of them the upper pal- 

 atal and suprapalatal folds are preceded by smaller folds within their 

 inner ends. The lower palatal fold is quite basal in position. The 

 first 1^ whorls are costellate, as in the allied but much larger 0. 

 spixii. 



Hidalgo describes a variety as more slender, corneous, very 

 closely sculptured with somewhat oblique, stronger and very irregu- 

 lar opaque-white striae; aperture about one-fourth the total length; 

 peristome less expanded, the margins generally connected by a 

 heavier callus. Length 22, diam. o mill. 



It is closely related to 0. maadosus, but distinguished by the light 

 color, slightly flatter whorls, the teeth and peristome, as well as the 

 whole shell more solid, less slender. 

 O. POPANUS Doering. 



Shell rimate, narrow, fusiform-turreted, subpellucid, pale brownish- 

 buff; closely wrinkle-striate; variegated with whitish, irregular pre- 

 dominating striee. Spire subfusiform turriculate, the apex but little 

 attenuated, rather obtuse. Whorls 9-10, scarcely convex, the first 

 more convex, uniform brown-buff, delicately substriate, the following 

 whorls variegated with close, whitish, opaque and irregular strise, 

 last whorl scarcely one-fourth the length of the shell, somewhat 

 compressed, whitish around the aperture, scrobiculate-impressed at 

 the side, two-crested at base. Aperture strongly angular, obliquely 

 subquadrangular, narrowed at the base, having 5 teeth ; peristome 

 white, acute, thickened within, the right margin angular above, col- 

 umellar margin reflexed ; margins joined by a thin parietal callus. 

 Length 2123, width 6^ mill.; aperture with peri&tome 6^ mill, 

 long, 4 wide (ZWr.). 



Argentina : Cerro de Popa, Sierra de Pocho. 



