58 PROCEEDINGS OF THE NATIONAL MUSEUM vol.70 



distinct, undulate, with a space on each side between it and the 

 nearest spiral cord; spiral sculpture of (on the penultimate whorl 5, 

 on the last whorl about 14) equal and equally distributed small cords 

 with much wider interspaces, little swollen where they cross the ribs, 

 and covering the whole shell; axial sculpture of (on the last whorl 

 about 11) rounded narrow ribs with much wider interspaces, cross- 

 ing the whole whorl, and in the interspaces conspicuous fine in- 

 cremental lines; aperture rather wide, outer lip sharp with 4 or 5 

 small pustular denticulations well within the margin; pillar smooth, 

 slightly concave, canal short, a little recurved. Length of shell, 6; 

 of last whorl, 4; diameter, 3 mm. U. S. Nat. Mus. Cat. No. 108312. 



Off Georgia, 16 specimens. 



The specimens obtained have been discolored by their stay on the 

 bottom and are of a brownish color like many of the other specimens 

 obtained from these two localities. 



Section ATILIA H. and A. Adams 



COLDMBELLA (ATILIA 7) MYSTICA, new species 



Shell small, slender, solid, pale brown (faded ?) with a smooth 

 nuclear whorl and a half, and four and a half subsequent whorls; 

 suture distinct, whorls well rounded; spiral sculpture of (on the spire 

 two, on the last whorl four) prominent cords near the periphery with 

 wider interspaces, and smaller close set threads on the base and in 

 front of the suture; axial sculpture of (on the last whorl about a 

 dozen) rather feeble rounded ribs with narrower interspaces, these 

 extend more or less obviously over the whorl; aperture ovate; outer 

 Up thin, denticulate within, inner lip smooth, canal short, strongly 

 spirally threaded, slightly recurved. Length, 4.3; diameter, 1.5 mm. 

 U. S. Nat. Mus. Cat. No. 108321 . 



Off Georgia, one specimen. 



Aesopus Jilosus AngSiS {= Columhella plurisulcata Reeve) from Port 

 Jackson, Australia, is somewhat such a shell as this, and is referred by 

 Tryon to Atilia. But if C. suffusa as indicated by Pace is the type of 

 Atilia, the present species can hardly be referred to the same group. 

 Without more material and investigation of what the Australian 

 shell involves, I hesitate to give a new sectional name. 



Family MURICIDAE 



Genus PTEROPURPURA Jousseaume 



PTEROPURPURA TRISTICHA Dall 



Pteronotus tristichus Dall, Bull. Mus. Comp. Zool., vol. 18, p. 202, pi. 15, 

 fig. 3, 1889. 



Off Georgia and Fernandina, one well grown and many young shells. 

 Off Cuba in 152 to 450 fathoms, U. S. S. BlaJce. 



