ODONTOSTOMUS. 81 



O. PROFUNDIDENS Doerino- 



O 



Shell rimate, cylindric-fusiform, turreted, slender, rather solid, 

 not shining; ashy-ochraeeous, often streakedly -variegated, with p<d- 

 lucid corneous obsolete spots ; very closely longitudinally rugulose- 

 striate, or very minutely costulate, with whitish. Spire eonic-turreted, 

 a little obtuse, the suture hair-like. Whorls 9, a trifle convex, the 

 first buff-corneous, slightly striate, the rest very closely obliquely 

 costulate-striate ; last whorl one-fourth the total length, whitish 

 around the aperture, pitted on the side, with a short, obsolete crest 

 below. Aperture suboval, contracted within by five teeth : one on 

 the parietal wall, a second arcuate and twisted tootli on the columella, 

 third in the base, fourth and fifth small, within the outer lip. 

 Peristome white, expanded, a little acute; the margins joined by a 

 thin callus, right margin shortly arcuate above, expanded beneath ; 

 columellar margin more widely reflexed, callous (Doer., Per. Zool.). 



Length 13Jf, diam. 3^, length of aperture 3, width 2| mill. 



Length 15, diam. 3^, length of aperture 4, width 2| mill. 



Length 15|, diam. 3^, length of aperture 4, width 3 mill. 



Shell fusiform, cylindrical, slender, not glossy, ashen-ochre color, 

 usually variegated in two streaks with obsolete pellucid-corneous 

 spots; very densely rugulose-striate or most minutely costulate. 

 Spire turreted, rather obtuse. Whorls 9, slightly convex, the last 

 one-fourth the total length peristome acute. Length 15, diam. 3f, 

 aperture with peristome 4 mill, long, 2|-3 wide (Doer., Boletin). 



Argentina : Sierra de Achala, around San Carlos, at 600 meters 

 elevation, province of Cordova (Stelzner). 



0. profundidens DOER., Bol. Acad. Cienc. Cordova, p. 455 (1875); 

 Periodico Zoologico, i, pt. 3, p. 185 (1875). B. profundidens Doer., 

 KOBELT, Nachrbl., 1876, p. 7. PFR., Monogr., viii, p. 611. 



This species is chiefly characterized by the rather sharpened 

 peristome, the lip thinner at the superior angle of the aperture. 

 These characters are, in some measure, common to the related but 

 much larger species 0. ntaculosus. 



O. TUMULORUM Doering. 



Shell cylindric-fusiform, small, rather solid, nearly smooth, slightly 

 shining; whitish, variegated with pellucid-corneous; spire fusiform- 

 turreted, slightly obtuse. Whorls 9, a trifle convex, the first corneous- 

 buff, the last one-fourth the total length. Teeth of the aperture 



