276 PROCEEDINGS OF THE NATIOyAL MUSEUM. vol.42. 



anteriorly; the spaces separating these cords are also narrow im- 

 pressed lines. Aperture moderately large, oval ; posterior angle acute ; 

 outer lip strongly curved showing the external sculpture within; 

 inner lip slightly curved, obhque, reflected over and adnate to the base, 

 provided with a slender fold at its insertion. Parietal wall covered 

 by a thin callus. 



The type (Cat. No. 249903, U.S.N.M.) was dredged in 6 fathoms at 

 the north end of Coronado Island, San Diego, by Doctor Baker. It 

 has 5 post nuclear whorls and measures: Length, 2 mm.; diameter, 

 1 mm. 



This species follows Odostomia (Chrysallida) dicella in the key. 



ODOSTOMIA (MENESTHO) GLORIOSA, new species. 



Plate 36, fig. 2, 2a. 



Shell moderately large, very elongate-ovate, with very regular, 

 conic spire, bluish-white. Nuclear whorls small, obliquely immersed 

 in the first of the succeeding turns, above which a portion of the last 

 two volutions only project. Post-nuclear whorls flattened, marked 

 by three equal and equaUy spaced, strong, spiral keels, of which one 

 is at the summit and another about as far above the periphery as the 

 space wliich separates it from the median keel. The spaces between 

 the spiral keels are deep, rounded grooves, almost as wide as the keels 

 and crossed by numerous, slender, axial threads. Sutures deeply 

 channeled; channels a little more profound than those between the 

 keels. Periphery of the last whorl marked by a sulcus. Base short, 

 well rounded, and marked by four subequal and subequally spaced, 

 spiral cords, the spaces between wliich appear as rather broad sulci 

 and are crossed by slender axial threads. Aperture small, very 

 oblique, ovate; posterior angle obtuse; outer lip thin, showing the 

 external sculpture within; inner lip short, curved, slightly revolute, 

 provided with a strong fold at its insertion; parietal wall glazed with 

 a thin callus. 



The type of this species (Cat. No. 211561, U.S.N.M.) was collected 

 by Mr. F. W. Kelsey at San Diego, California; it has 6 post-nuclear 

 whorls and measures: Length, 2.8 mm.; diameter, 1.3 mm. Another 

 specimen, in Mr. Kelsey's collection, is a little larger than the type, 

 measuring: Length, 3.1 mm.; diameter, 1.4 mm. This was collected 

 by Mr. Henry Hemphill at San Hipolito Pomt, Lower California. 



This species follows Odostomia {Menestho) recta in the key. 



ODOSTOMIA (MENESTHO) EXCISA, new species. 

 Plate 36, fig. 8. 



Shell moderately large, elongate-ovate, yeUo wish-white. Nuclear 

 whorls decollated. Post-nuclear whorls well rounded, appressed at 

 the summit, marked by four equally strong but not equally spaced, 

 incised, spiral lines between the sutures. The fourth of these is 



