524 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxin. 



more abruptly so on the posterior third between the sutures. Sum- 

 mits very nnrrowly flattened which renders the sutures well marked. 

 Periphery of the last whorl slightly angulated. Base slightly con- 

 tracted, moderately rounded between the periphery and umbilical area, 

 narrowly produced to reenforce the columella. Entire surface marked 

 by numerous somewhat wavy, subequal and subequall}^ spaced minute 

 slender spiral lirations, of which there are about 35 between the sum- 

 mit and the periphery and an equal number between the periphery 

 and the base on the last turn. Aperture large, patulous anteriorly; 

 posterior angle acute, outer lip thin at the edge, thick within; colu- 

 mella curved, somewhat reflected, reenforced by the attenuated base, 

 and provided with a strong oblique fold at its insertion. 



The two cotypes (Cat. No. 15521(?, U.S.N.M.) were collected by 

 Coh:)nel Jewett at Santa Barbara, California. One is a young speci- 

 men consisting of the nucleus and three post-nuclear whorls; the other 

 has lost the luicleus and probably the tirst two post-nuclear turns; the 

 five which remain measure: Length 6.1 mm., diameter 3.8 mm. 



ODOSTOMIA (EVALEA) INFLATA Carpenter. 

 Plate XLVII, fig. 8. 



Shell ovate, white. Nuclear whorls decollated. Post-nuclear whorls 

 inflated, gentl}" curved over the anterior two-thirds of the whorl 

 between the sutures and more strongly so on the posterior third, this 

 portion forming an evenly curved shoulder. Extreme summit of the 

 whorls slightly flattened and narrow, rendering the sutures well marked. 

 Periphery of the last whorl subangulated. Base attenuated, rather 

 suddenly contracted below the periphery, which gives the space 

 between the periphery and the umbilical area a concave aspect. P^ntire 

 surface marked by tine lines of g'rowth and many fine, closely placed 

 spiral lirations, five of which are a little stronger than the rest and 

 divide the space between the sutures into subequal areas. There are 

 about 30 of these threads upon the last turn between the summit and 

 the peripher}' and about 60 on the base. Aperture very large, patulous 

 anteriorly; outer lip thin at the edge but very thick within; columella 

 decidedly curved, and revolute, reenforced to the very edge by the 

 attenuated base, provided with a strong oblique fold at its insertion. 



The type and a young individual (Cat. No. 15521/v) were collected 

 by J. G. Swan at Neah Bay, Washington. It has the last four Avhorls 

 (the nucleus and probably the first post-nuclear turn being lost) and 

 measures: Length 6.2 mm., diameter 3.8 mm. 



