264 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.42. 



DESCRIPTIONS OF SPECIES. 



TURBONILLA (CHEMNITZIA) CLARINDA, new species. 

 Plate 35, fig. 4, 4a. 



Shell elongate-conic, bluish-white, semitranslucent. Nuclear 

 whorls 2^2, forming a rather solute, elevated, helicoid spire, whose axis 

 is at right angles to the succeeding turns, in the first of which it is 

 slightly immersed. Post-nuclear whorls well rounded, appressed at 

 the summit, marked by very regular, rounded, slightly protractive, 

 axial ribs, of which 16 occur upon the first to seventh, 18 upon the 

 eighth and the penultimate turn. These ribs become slightly flat- 

 tened and somewhat expanded at the summit. Intercostal spaces a 

 little wider than the ribs, well impressed, termmating a little posterior 

 to the suture, thus leaving a plain, narrow band immediately above 

 the suture. Sutures somewhat constricted. Periphery and base of 

 the last whorl well rounded, smooth. Aperture subquadrate; poste- 

 rior angle obtuse ; outer lip thin, showing the external sculpture within; 

 inner lip slender, slightly sinuous, and very slightly revolute. 



The type and 2 additional specimens are listed as Cat. No. 211546, 

 U.S.N.M. These and 5 other specimens, in Mr. Kelsey's collection, 

 were dredged in 12 to 30 fathoms in San Diego Bay, California. The 

 type has 10 post-nuclear whorls and measures: Length, 4.7 mm.; 

 diameter, 1.1 mm. 



This species follows Turhonilla (Chemnitzia) santarosana in the key. 



TURBONILLA (STRIOTURBONILLA) DINORA, new species. 

 Plate 35, fig. 8. 



Shell very elongate-conic, milk-white. Nuclear whorls small, at 

 least 2, about one-third immersed in the first of the succeeding turns. 

 Post-nuclear whorls slightly rounded, narrowly shouldered at the 

 summit, marked by very strong, very regular, broad, rounded, slightly 

 curved, decidedly protractive, axial ribs, of which 14 occur upon the 

 first to seventh whorl, 16 upon the eighth and ninth, 18 upon the 

 tenth and the penultimate turn. Intercostal spaces very strongly 

 impressed, as wide as the ribs, terminating a little anterior to the 

 suture. Periphery of the last whorl well rounded; base short, well 

 rounded, marked by lines of growth and numerous, exceedingly fine, 

 spiral striations; the latter also cross the ribs and intercostal spaces 

 on the spire. Sutures strongly constricted. Aperture subquadrate; 

 posterior angle obtuse ; outer lip thin, showing the external sculpture 

 within; inner lip short, somewhat curved and revolute, without 

 apparent fold; parietal wall glazed with a thin callus. 



The unique type of this species (Cat. No. 211553, U.S.N.M.) was 

 collected by Miss J. M. Cooke on the sandspit in San Diego Bay, Cali- 



