ODONTOSTOMUS. 101 



subquadrate, in the middle of the outer lip, almost reaching to the 

 margin, and 25 folds within the basal, 2 within the upper part of the 

 outer lip, and some obsolete denticulation at the base of the columellar 

 lamella; a high, transverse lamella deep in the aperture, and visible 

 by translucence from the outside. Peristome broadly expanded, 

 white, lipped inside, subangular above on the right side, the margins 

 joined by a very thin callus. Length 26-29, diam. 12-14, length 

 of aperture with peristome 12-13, width 10 mill. (Kob.}. 



Argentina: a few moist ravines, the "Nieve" and the "Mermela," 

 on the western slope of the Sierra de Aconjigasta. 



Plagjodontes weyemberglm DOER., Apuntes, iii, in Periodico 

 Zoologico, ii, pt. 4, p. 239 (1877). Bidimus weyeiiberyldi Doer., 

 KOBELT, Jahrb., 1880, p. 289, pi. 9, f. 11, 12 B. weyentber ,///// 

 KOBELT, Jahrb., 1878, p. 133. 



Close to the preceding species, but darker colored, witli shorter, 

 blunter apical cone, completely flat whorls, and with an acute carina, 

 which extends to the aperture, at least faintly. The teeth are as in the 

 two species preceding, only stronger, and seem to be equally variable. 



The spelling " iveyemberghii " was obviously a misprint for weyen- 

 bergkii, the species being named in honor of Dr. D. H. Weyenbergh, 

 Professor of Zoology in the National University of Cordova. 



O. MULTIPLICATUS Doering. 



Shell deeply rimate, ovate-oblong, closely, regularly striate, rather 

 solid, opaque ; spire elongate, the apex attenuated-acute. Whorls 7, 

 a trifle convex, the last scarcely two-fifths the total length, with a 

 slight basal crest. Aperture subvertical, ovate, nearly closed by 

 8-10 teeth, three of them large : the first angulate, twisted and 

 grooved, on the parietal wall ; the second tongue-shaped, excavated, 

 on the columella; the third twisted, within the right margin. There 

 are also 3-5 minute folds within the basal and two obsolete ones 

 within the upper part of the outer lip, and a transverse fold deeper 

 in the aperture. Peristome somewhat thickened, lipped, expanded, 

 a little reflexed, the margins joined by a thin callus. Length 27, 

 diam. 10, aperture with peristome 10^ mill, long, 8 wide (Doer.). 



Argentina: Cerro de Chepe, province of Rioja (Stekner). 



Odontostomus multiplicatus DOERING, Periodico Zuologico, i, pt. 3, 

 p. 196 (1875); Boletin Acad. nac. Ciencias, Cordoba, 1875, p. 452. 

 Bulimus (Odontostomus^) multiplicatus KOB., Nachr. malak. Ges., 

 viii, 1876, p. 5 PFR., Monogr., viii, p. 612. 



