476 rROCEEDTNGS OF THE NATIONAL MUSEUM. vol.53. 



sculpture of extremely fine close-set striae; terminal varix not 

 enlarged, the varices not continuous over the suture nor enlarged or 

 spinose; aperture obliquely ovoid. Length, 14; diameter, 5.5 mm. 

 U. S. Nat. Mus. Cat. No. 106875. Range, beach at San Pedro, 

 California, Delos Arnold. 



EPITONIUM PACIS, new species. 



Shell white, thin, with eight well-rounded whorls exclusive of 

 three smooth, acute, nuclear turns; varices 18, with wider inter- 

 spaces, narrow, thin, smooth, not generally continuous, with a small 

 sharp short spine a little distance in front of the suture; spiral sculp- 

 ture of, on the last whorl, about 20 sharply defined threads, mostly 

 with wider interspaces, in which there are fine spiral striulae; there 

 is a smooth space in front of the suture and another around the 

 narrowly perforate umbilicus, without spiral sculpture; aperture 

 ovoid; operculum blackish, concave, of about three whorls. Length, 

 12.5; diameter, 6 mm. U. S. Nat. Mus. Cat. No. 96821. Range, in 

 the vicinity of La Paz, Lower California, in 10 to 45 fathoms. 



EPITONIUM EMYDONESUS, new species. 



Shell minute, white, with two smooth, polished, nuclear, and four 

 and a half subsequent well-rounded whorls; varices 14, sharp, hardly 

 reflected, not continuous over the suture, slightly crenulated by the 

 spiral sculpture of distinct, close, rounded threads; base rounded, 

 imperforate; aperture rounded. Length, 3.5; diameter, 1.7 mm. 

 U. S. Nat. Mus. Cat. No. 194995. Range, Galapagos Islands, in 40 

 fathoms, sandy bottom. 



EPITONIUM IMPERFORATUM, new species. 



Shell small, white, with two polished nuclear and four or five 

 subsequent roimded whorls with a deep suture and imperforate base; 

 varices 20 or 21, low, narrow, with wider interspaces, not continuous 

 over the suture, and having a small angle at the shoulder which gives 

 a slightly turrited aspect to the spire; spiral sculpture of close-set 

 similar spiral threads covering the whole surface between the varices ; 

 aperture ovate. Length, 4.5; diameter, 2.5 mm. U. S. Nat. Mus. 

 Cat. No. 211391. Range, off La Paz, Lower California, in 26 

 fathoms. 



EPITONIUM ONCHODES. new species. 



Shell minute, white, thin, with two smooth nuclear and four 

 rapidly enlarging subsequent whorls; base minutely perforate; 

 varices 19, thin, low, sharp, not spinose or continuous over the 

 very deep suture; spiral sculpture of uniform, very fine, close-set 

 threads covering the whole whorl between the varices; aperture 

 obliquely ovate. Length, 3 ; diameter, 1 .5 mm. U. S. Nat. Mus. Cat. 

 No. 211786a. Range, Panama Bay in 62 fathoms, sand. 



