ABT. 18 SMALL SHELLS DREDGED BY ** ALBATEOSS '' ^DALL 47 



These specimens differ from typical torticula in being smaller, ap- 

 parently more slender, and having the torsion much less evident, but 

 there seems to be some intergradation. 



HYALINA (variety?) AVENELLA Dall 



Marginella {avena variety ?) avenella Dall, Bull. Mus. Comp. Zool., vol. 9, 



p. 73, 1881. 

 Marginella succinea (Conrad) Dall, Bull. Mus. Comp. Zool., vol. 18, p. 189, 



pi. 19, fig. 6, 1889. 



Off Fernandina, three immature specimens. Also at various Antil- 

 lean stations in 125 to 805 fathoms, and off Cape Antonio, in 1,002 

 fathoms. Temperatures from 40° to 50° F. when recorded. U. S. 

 Nat. Mus. Cat. No. 107979. 



Nothing is more puzzling, when it comes to differentiating species 

 from their shells alone, than these forms of Hyalina. How to weigh 

 differences (apparently constant) of size, is a problem. In the ab- 

 sence of color or sculpture, the best conclusion must be tentative. 



In view of the fact that Conrad's figures, though showing little fin- 

 ish, are usually characteristic, I am inclined to believe that the alleged 

 type of the Academy of Sciences is not the original, as the figure 

 represents a much stouter, shorter, and, so to speak, more normal 

 Marginella. So I am disposed to resume my name for the slender, 

 pure white, elongate abyssal species. 



Genus CYPRAEOLINA CeruHi-Irelli 



CYPRAEOLINA HADRIA Dall 



Marginella (Volutella) hadria Dall, Bull. U. S. Nat. Mus. No. 37, p. 108, 1889. 



Shell minute, involved, of an exact egg-oval form, white, polished; 

 aperture narrow, slightly wider in front; outer lip thickened but 

 with no groove behind it; pillar with a thin coating of enamel, pillar 

 short with two prominent and two much less conspicuous plaits; 

 body smooth. Length, 2.6; diameter, 2.8 mm. U. S. Nat. Mus. Cat. 

 No. 107984. 



Off Georgia, eighteen, and off Fernandina, one specimen. Cedar 

 Keys, Florida, Hemphill; Charlotte Harbor, Dall; Chesapeake Bay, 

 Bahamas, and various Cuban localities; Henderson. 



This is more globose and larger than C. lachrimula Gould. 



CYPRAEOLINA TINOLIA, new species 



Shell minute, ovate, involved, translucent white, smooth and 

 polished, the anterior end a little attenuated; the aperture as long 

 as the shell; outer lip thickened, slightly varicose, not crenulate; the 

 lines of growth are extremely faint and there is no other sculpture; 

 pillar very short with two large and two closely adjacent very minute 

 plaits. Length, 3; diameter, 1.7 mm. U. S. Nat. Mus. Cat. No. 

 107983. 



