206 BULLETIN 68, UNITED STATES NATIONAL MUSEUM. 



rest, which are equal. The entire surface of the last whorl is marked 

 by numerous yery fine, closely spaced, wavy, spiral striations. 

 Suture well impressed. Periphery and base of the last whorl inflated 

 and well rounded. Aperture oval; posterior angle acute; outer lip 

 thin; columella moderately strong, decidedl}^ curved, somewhat re- 

 flected, reenforced by the base, provided with a fold at its insertion. 

 The type (Cat. no. 56770 U.S.N.M.) comes from Santa Rosa 

 Island. It has six post-nuclear whorls and measures: Length 4.9 

 mm., diameter 2.7 mm. 



ODOSTOMIA (EVALEA) TENUISCULPTA Carpenter. 



Plate 23, fig. 2. 



Odostomia tcnuisculpta Carpenter, 2d Rept. Brit. Assoc. Adv. Sci., 1864,. p. 

 659; Ann. Mag. Nat. Hist., vol. 15, 1865, p. 30. -\-Odostomia straminea 

 Carpenter, Journ. de Conch., vol. 13, 1865, p. 146-147. Odostomia (Evalea) 

 tenuisculpta (Carpenter), Dall and Bartsch, Proc. U. S. Nat. Mus., vol. 

 33, 1907, p. 527, pi. 47, fig. 6. 



Shell elongate-ovate, yellowish, with the early whorls spirally lirate 

 and the later ones only obsoletely so. Nuclear whorls small, smooth, 

 oblicjuely, almost completely, immersed in the first of the succeeding 

 turns. Post-nuclear whorls evenly well-rounded with appressed sum- 

 mits. The first three marked between the sutures by many subequal 

 lirai of wdiich there are about fifteen on the second turn. On the last 

 two turns these lirations become quite obsolete. Periphery and base 

 of the last whorl inflated and well rounded, marked by very feeble 

 spiral striation and lines of growth. Aperture moderately large, oval; 

 somewhat effuse anteriorly; posterior angle acute; outer lip thin; 

 columella strongly curved, reenforced partly by the attenuated base, 

 moderately reflected anteriorly, bearing a strong fold at its insertion, 

 which appears as if it were the inflected termination of the columella. 



Doctor Carpenter's type (Cat. no. 15520, U.S.N.M.) is a young 

 individual. It was collected by J. G. Swan at Neah Bay, Washington, 

 has three post-nuclear whorls, and measures: Length 2.3 mm., 

 diameter 1.7 mm. The adult characters w^ere described from two 

 specimens (Cat. no. 46483, l^.S.N.M.) collected by J. G. Swan at 

 Neah Bay, Wasliington. One of these, the one figured, has six post- 

 nuclear whorls and measures: Length 5.3 mm., diameter 2.9 mm. 

 A specimen collected by Merrihew (Cat. no. 196247, U.S.N.M.), at 

 Port Harford, California, bears a slender raised cord on the ])eriph- 

 ery of the whorl. 



The large series of specimens in the U. S. National Museum proves 

 conclusively that 0. straminea Carpenter is the smooth southern rep- 

 resentative of this species. 



