126 PKOCEEDINGS OF THE NATIONAL MUSEUM vol.70 



VITRINELLA7 CARINIFEX, new species 



Shell small, translucent white, the spire depressed, with three 

 whorls, the last whorl much the largest; suture distinct, not deep; the 

 last whorl with the periphery at the posterior third, giving an effect 

 which calls to mind the rounded variety of the fresh-water Carinifex; 

 sculpture only of feeble incremental lines; base with the slope toward 

 the small umbilicus slightly flattened; the verge of the umbilicus 

 almost carinate; aperture obovate, the lips thin, united over the body 

 by a marked layer of enamel. Height, 2.5 mm.; diameter, 3.7 mm. 

 U. S. Nat. Mus. Cat. No. 108399. 



Off Georgia, three specimens. 



This is probably not a true Vitrinella and may be immature but 

 certainly is not the young of any of the species enumerated in this 

 discussion. 



Genus PSEUDOROTELLA Fischer, 1857 



PSEUDOROTELLA SOLIDA (Doll) 



Ethalia solida Dall, Bull. Mus. Comp. Zool., vol. 18, pt. 2. p. 362, pi. 28, 

 figs. 3, 5, 1889. 



Off Georgia and Fernandina, numerous. Also off Bahia Honda, 

 Cuba, in 310 fathoms, bottom temperature 62° F., Blake expedition. 



PSEUDOROTELLA FLORIDENSIS.new species 



Shell small, porcellanous white, smooth, polished, turbinate, with 

 four well-rounded whorls; suture distinct, not deep; aperture nearly 

 circular, the margin simple, continuous over the body with a marked 

 deposit of enamel behind the body lip and over the umbilical region, 

 completely closing the umbilicus and in the completely adult some- 

 times produced in subangulate form above and below. Height, 2 

 mm.; maximum diameter, 3 mm. U. S. Nat. Mus. Cat. No. 108133. 



Off Fernandina, abundant. 



This is much like P. solida, but larger, more elevated, and with 

 the umbilical pad heavier and more simple. 



Genus CALLIOSTOMA Swainson, 1840 



CALLIOSTOMA BENEDICTI Dail 



Calliostoma (Eutrochus) benedicti Dall, Bull. Mus. Comp. Zool., vol. 18, p. 

 371, pi. 32, fig. 7, 1889. 



Two very young specimens off Fernandina. Off Cape Lookout, 

 N. C, in 200 fathoms. United States Fish Commission. 



The Trochidae in this collection are chiefly represented by imma- 

 ture and sometimes very small specimens. 



CALLIOSTOMA (EUTROCHUS) HENDERSONI Dall 



Calliostoma hendersoni Dall, Proc. U. S. Nat. Mus., vol. 70, No. 2668, p. 7, 

 Feb. 1927. 



Off Fernandina, one very young specimen, and off the Sambo Reef, 

 Fla., in 116 fathoms. Henderson. 



