42 PROCEEDINGS OF THE NATIONAL MUSEUM vol.70 



MANGILIA 7 RHABDEA, new species 



Shell white, with a smooth nucleus of about one whorl and three 

 subsequent nearly cylindrical whorls; suture distinct, not appressed, 

 anal fasciole faintly indicated; axial sculpture only of obscure incre- 

 mental lines; spiral sculpture of on the last whorl only, a faint sug- 

 gestion of an angle at the shoulder; aperture narrow, about two-fifths 

 as long as the shell; outer lip thin, protractively arcuate; anal sulcus 

 wide and deep; pillar straight, canal hardly differentiated. Length, 

 4.5; diameter, 1.5 mm. U. S. Nat. Mus. Cat. No. 107949. 



One specimen, off Fernandina. 



Although the specimen is defective and possibly immature, the 

 characters are so distinctive that it can not fail to be recognized. 



CYMATOSYRINX EBUR. new species 



Shell small, white, solid, with a swollen nucleus of a whorl and a 

 half and five and a half subsequent whorls; suture distinct, not ap- 

 pressed, with a slightly constricted fasciole in front of it; axial sculp- 

 ture of (on the last whorl 10-11) rounded fiexuous smooth ribs, most 

 prominent at the periphery on the spire, sigmoidly flexed on the last 

 whorl and absent from the base; the interspaces are equal or wider 

 than the ribs; there is no spiral sculpture; the aperture is wide, less 

 than a third of the whole length, the anal sulcus wide and deep, the 

 outer lip very prominently proti'actively arcuate, the pillar short, the 

 canal short and wide, the axis not pervious. Length, 8; diameter, 

 3.2 mm. U. S. Nat. Mus. Cat. No. 107948. 



Off Fernandina, about 20 specimens. 



There are several other species of this family represented by young 

 or fragmentary specimens too imperfect to serve for a satisfactory 

 diagnosis. 



Family CANCELLARIIDAE 



Genus ADMETE Kroyer 

 Section MICROCANCILLA Ball, 1924 



ADMETE MICROSCOPICA Dall 



Cancellaria? microscopica Dall, Bull. Mus. Comp. Zool.,vol 18, p. 131, 1889. 

 Admete {Microcancilla) microscopica Dall, Proc. Biol. Soc. Wash., vol. 37, p. 

 87, 1924. 



Shell small, short, wide, white with a small, smooth, white blunt 

 nucleus of a whorl and a half and about two and a half subsequent 

 whorls; whorls convex, suture distinct, deep, with a marked shoulder 

 in front of it; axial sculpture of (on the last whorl about 14) 

 low rounded nearly vertical ribs with narrower interspaces, crossing 

 the periphery, obsolete on the base; and very faint incremental lines; 

 spiral sculpture of (on the last whorl about 9) equal and equally spaced 

 slender threads with wider interspaces, reticulating but not nodulat- 



