188 BULLETIN 68, UNITED STATES NATIONAL MUSEUM. 



ODOSTOMIA (MENESTHOj CALLIPYRGA Dall and Bartsch. 



Plate 20, fig. 9. 



Odostomia iOdctta) callipynja Dall and Bartsch, Proc. Biol. Soc. Wash., vol. 17, 

 1904, p. 12. =Odetta clegans de Folin, Fonds de la Mer, vol. 2, 1872, p. 167, 

 pi. 6, fig. 4; not Odostomia (Evalea) elegans A. Adams, 1860, nor Harvella 

 [=Odostomia] elegans H. and A. Adams, 1863, nor Odostomia elegans Mon- 

 te rosato, 1869. 



Shell oblong-ovate, somewhat ventricose, white. Nuclear whorls 

 nearly half immersed in the first of the succeeding turns. Post- 

 nuclear whorls somewhat inflated, moderately contracted at the 

 periphery and moderately shouldered at the summit, marked by 

 strong spiral cords of which 2 appear upon the first, 3 upon the sec- 

 ond, and 4^ upon the penultimate turn between the sutures. These 

 cords are separated by well impressed, narrow, spiral grooves which 

 are crossed by slender axial threads. Periphery and base of the last 

 whorl well rounded, marked by four spiral cords, similar to those on 

 the spire, the space between which is ornamented like the grooves in 

 the spire. Aperture oval; posterior angle acute; outer lij) thin, show- 

 ing the external scidpture within; columella slender, somewhat 

 curved and slightly reflected, provided with a fold at its insertion. 



The type was collected at Alargarita Island, Baj" of Panama. It 

 has four post-nuclear whorls and measiu-es: Length 2.2 mm., diam- 

 eter 1 mm. 



ODOSTOMIA (MENESTHO) FARMA, new species. 

 Plate 20, figs. 1, la. 



Shell elongate, ovate, cream-colored. Nuclear whorls at least two, 

 marked with three slender, spiral lirations, the apex being deeply 

 obliquely immersed in the first of the succeeding turns. The junc- 

 tion of the nucleus and the post-nuclear whorls is marked by a varix. 

 Post-nuclear whorls well rounded, marked by three equal and sub- 

 equally spaced spiral grooves which are crossed by slender axial 

 riblets, the combination of grooves and ribs giving the whorls a 

 pitted appearance. The four raised spaces bounded by the spiral 

 grooves are finely sjjirally striated. Suture deeply channeled. 

 Periphery of the last wliorl marked by a spiral groove. Base of the 

 last whorl well rounded, marked by four incised lines on the posterior 

 two-thirds, which are equally spaced but grow successively weaker. 

 The peripheral and first sub})eripheral channel are equal to those on 

 the spire; all are rendered pitted by the slender axial riblets. An- 

 terior third smooth. Aperture broadly oval, somewhat eftuse an- 

 teriorly; posterior angle acute; outer lip thin; columella slender, 

 curved, somewhat reflected and reenforced by the base; parietal wall 

 covered by a thin callus. 



The type (Cat. no. 206908 U.S.N.M.) comes from Catalina Island, 

 California. It has five post-nuclear whorls and measures: Length 

 2.4 mm., diameter L2 mm. 



