320 PROCEEDINGS OF THE NATIONAL MUSEUM. tot,. 53. 



MELANELLA (BALCIS) MONTEREYENSIS, new species. 



Plate 39, fig. 6. 



Shell broadly conic, falcate, flexed to the right, bluish-white, with a 

 scries of opaque areas, marking varicial streaks. Early whorls weU 

 rounded, the later ones slightly rounded, a little more so on tho 

 convex than tho concave side. Sutures scarcely marked. Tho 

 posterior determination on the inside of the turns, shines through tho 

 substance of the shell and appears as a conspicuous false suture. 

 Periphery weakly angulatcd. Base short, very strongly curved on 

 the left side. Aperture short, broadly oval; posterior angle acute; 

 outer Up quite strongly protracted at the periphery, inner lip oblique, 

 curved, reflected and appressed to the base; parietal wall covered by 

 a thick callus. 



The type (Cat. No. 176623, U.S.N.M.) was dredged by Dr. S. S. 

 Berry, at Pacific Grove, California. It has lost probably the first 

 three turns. The eight remaining measure — length, 5 mm.; diam- 

 eter, 2.2 mm. 



Cat. No. 181307, U.S.N.M., contains a young specimen, collected 

 by Mrs. Merrihew, at Monterey, California. 



MELANELLA (BALCIS) PENINSULARIS, new species. 



Plate 39, fig. 4. 



Shell elongate-conic, very slightly curved, pohshed, surface marked 

 by exceedingly fine lines of growth and exceedingly regular, very fine, 

 microscopic, spiral striations; bluish-white, except where the animal 

 shines through the substance of the shell, when it appears brown. 

 Whorls separated by a very poorly defined suture, which is incon- 

 spicuous compared to the false suture caused by the base of the pre- 

 ceding whorl shining through the substance of the succeeding turn. 

 The whorls are marked at irregular intervals by thickened varices, 

 which are very prominent. Periphery of the last whorl well rounded. 

 Base short, slightly rounded, the left sides sloping very obhquely. 

 Aperture broadly oval; posterior angle acute, outer lip decidedly 

 protracted half way between the posterior angle and the base; inner 

 lip very oblique, moderately strong, slightly curved, reflected over 

 and appressed to tlie base; parietal wall covered with a thick callus. 



The type (Cat. No. 251264, U.S.N.M.) comes from Lower Cali- 

 fornia. It has 11 whorls and measures — length, 5.2 mm.; diameter. 

 2.2 mm. 



