48 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 70 



Off Fernandina. 



Some of the specimens are more attenuated than others, but all 

 are more elongated and narrow than C. hadria. There is also more 

 of an excavation (not a groove) behind the thickened outer lip than 

 in that species. 



CYPRAEOLINA TRUNCATA.new species 



Shell minute, translucent white, polished, the aperture rather wide, 

 as long as the shell; spire involved, squarely truncate, the body of 

 the shell more or less cylindrical, attenuated in front; outer lip 

 straight, edentulous, moderately thickened; pillar with two strong 

 and usually two very minute plaits behind the others, though at 

 some stages of growth these last may be missing; the anterior edge of 

 the pillar is twisted and merged into the outer lip with quite a marked 

 depression behind it. Length, 2.3; diameter, 1.3 mm. U. S. Nat. 

 Mus.Cat. No. 108336. 



Off Georgia and Fernandina, one specimen each. 



This is a remarkably distinct species. 



Family VOLUTIDAE 



Genus AURINIA Adams 



AURINIA GOLXDIANA Dall 



Voluta gouldiana Dall, Conch. Exchange, vol. 2, p. 10, July, 1887. 

 Aurinia gouldiana Dall, Bull. Mus. Comp. Zool., vol. 18, p. 154, pi. 29, fig. 

 3, 1889; Trans. Wagner Inst., vol. 3, p. 81, pi. 7, fig. 2, 1890. 



Off Georgia and Fernandina; also from oft" North Carolina to Key 

 West, in 159 to 509 fathoms, bottom temperature, 45.2° to 48.3° 

 F., living. 



A fragment of this interesting species in which the reddish spiral 

 bands are broken into squarish spots, was dredged in 50 fathoms off 

 Key West, but was probably brought into shallow water by a fish. 



Family MITRIDAE 



Genus MITRA Martyn 



MITRA STYLIGLA, new species 



Shell small (immature), white, fusiform, with a translucent yellow- 

 ish, smooth, polished nucleus of a whorl and a half and five or more 

 subsequent whorls; suture distinct, hardly appressed; whorls flattish 

 behind; axial sculpture of (on the last whorl about 20) vertical 

 rounded ribs, crossing the whorls, with narrower or equal interspaces, 

 but obsolete on the base; incremental lines obscure; spiral sculpture 

 of numerous (on the last whorl about 23) equal and equally distrib- 

 uted even threads, with wider interspaces, hardly swollen at the 



