38 PROCEEDINGS OF THE NATIONAL MUSEUM vol.70 



suture, sharply nodulous at the shoulder and obsolete on the base; 

 incremental lines inconspicuous; spiral sculpture of (on the spire three, 

 on the last whorl six or seven, alternating in strength) sharp threads 

 prominently nodulous where they override the ribs; base and pillar 

 smooth; aperture ovate, about one-fourth the whole length, canal 

 hardly differentiated, pillar very short; outer lip sharp, anal sulcus 

 wide and shallow. Length, 7.5; diameter, 2.2 mm. U. S. Nat. Mus- 

 Cat. No. 333446. 



One specimen, off Fernandina. 



The strong rather sharp sculpture gives this form a peculiarly 

 elegant appearance. 



MANGILIA? CROSSATA, new species 



Shell small, resembling a Lora in shape, white, biconic, the aper- 

 ture more than half the total length, polished, with a very short 

 smooth nuclear whorl and three subsequent whorls; suture distinct, 

 appressed, coronated by the ends of the ribs; spire very short, whorls 

 with a subangular shoulder; axial sculpture of (on the last whorl 

 about a dozen) narrow elevated ribs with wider interspaces extend- 

 ing from the suture to the base where they become obsolete, mi- 

 nutely nodulous where they cross the angle at the shoulder; spiral 

 sculpture of faint fine threading, on the canal and the anterior part of 

 the base; aperture narrow, canal hardly differentiated, anal sulcus 

 shallow; pillar straight, attenuated in front, outer lip thin, sharp, 

 nearly straight, axis impervious. Length, 6; diameter, 3 mm. U. S. 

 Nat. Mus. Cat. No. 107959. 



Six specimens, off Fernandina. 



MANGILIA? CRYERA, new species 



Shell much resembling M. crossata, but thinner, more glassy, aver- 

 aging smaller, with no coronation at the suture, and with a faint per- 

 vasive spiral striation. Length, 5; diameter, 2.1 mm. U. S. Nat. 

 Mus. Cat. No. 107960. 



Numerous both off Fernandina and Georgia. 



This species, like most of these deep water gastropods varies in the 

 strength of its sculpture, and a few specimens have the shoulder angle 

 obsolete or completely rounded off. 



MANGILIA? CHRISTINA, new species 



Shell small, thin, slender, lucid white, with a large swollen nucleus 

 of a whorl and a half and nearly four subsequent whorls; suture dis- 

 tinct, not appressed or marginated ; f asciole in front of it obscure but 

 giving rise to a distinct shoulder not far from the suture; aperture 

 about half the length of the shell; the whorls flattish; axial sculpture 

 of (on the last whorl or a dozen) narrow, nearly straight ribs, with 

 wider interspaces, obsolete on the base, but occasionally a little nod- 



