2 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 77 



DRYMAEUS HARRINGTON!, new species 



Plate 1, Figure 7 



Shell rather thin, translucent, of stout form, ovate-fusiform. Aper- 

 ture equal to the spire. Apical whorls regularly grated by vertical 

 and spiral lines. Whorls 6^/^, slightly convex, body whorl somewhat 

 flattened behind the aperture. Sutures linear, not deep. Sculpture 

 of numerous nearly regular longitudinal growth lines and faint in- 

 dications of spiral striae. Ground color nearly white with flames, 

 bands, and spots of chestnut and blackish brown or purple. On the 

 back of the body whorl the dark color is arranged in five broad bands. 

 On the rest of this whorl it is in longitudinal, jagged bars; on the 

 upper whorls it is arranged in spiral bands of small squarish chest- 

 nut spots. The interior is whitish with the five bands of the exterior 

 prominent. Umbilicus narrow. Aperture nearlj^ vertical, slightly 

 drawn down at base. Lip a little expanded and reflected. Columella 

 broadly expanded and almost concealing the umbilicus. Parietal 

 wall with a thin callus. 



The type (Cat. No. 380701, U.S.N.M.) measures: Length, 35 mm.; 

 diameter, 17 mm. ; length of aperture, 17.5 mm. It comes from Gen- 

 eral Ballivian, Province of Salta, Argentina, and was collected and 

 presented by G. L. Harrington. 



Its nearest relatives are Drymaeus abyssorum Orbigny and Dry- 

 maeus hygrohylaeus Orbigny, both of which inhabit the same gen- 

 eral region. 



ODONTOSTOMUS (PLAGIODONTES) TEISSEIREI, new species 



Plate 1, Figure 3 



Shell elongate, the spire tapering, the body whorl on the back 

 tapering, pinched to an angle at the base. Umbilicus openly rimate ; 

 whorls 81/2, rather flatly convex, sutures linear, irregularly crenate, 

 whitish; sculpture of faint longitudinal striae, without spiral sculp- 

 ture. Aperture nearly vertical, outer lip slightly curving, basal 

 lip abruptly rounded, columellar lip oblique, angular at the left, in 

 front view completely concealing the umbilicus. Color nearly white, 

 the sutures still lighter. Aj^erture pure white, reflected edge thick- 

 ened, nearly filled with eight teeth, three of which are large and 

 twisted, as follows: A large 2-ribbed tooth on the parietal wall, its 

 lower edge continuing as a twisted plate for about 4 mm. within 

 the shell. A broad, twisted tooth at the middle of the outer lip, its 

 upper edge continuing within for about 2 mm. ; a very broad, tongue- 

 like tooth on the columella bearing a minute denticle on its face, its 

 lower and upper edges continued as ribs twining about the columella 

 within the shell nearly to the base of the penultimate whorl. The 



