338 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY, 
U.S. S. “ Albatross,” station 2807, near the Galapagos Islands, in 812 fath- 
oms, ooze, bottom temperature 389.4 F. U. S. N. Mus, 96,481. 
This shell recalls Natica impervia Philippi, but is proportionately wider, and has 
ahorny operculum, while according to Strebel Philippi’s species belongs to Cryp- 
tonatica, having a smooth shelly operculum. 
Polinices (Huspira) strebeli Darr, n. sp. 
Shell small, thin, rotund, polished, smooth except for incremental lines, and a 
great variety of irregular scratches which are probably pathological ; periostracum 
pale brownish; whorls about four and a half, rounded, with an almost appressed 
suture, of the normal form ; aperture oval, outer lip thin, sharp; body with a thin 
callus arcuately indented behind, thick and spreading in the umbilical region, 
where the umbilicus is completely filled, leaving only a chink distally, which does 
not lead. to a definite perforation ; pillar-lip in front of the callus, thickened, pass, 
ing imperceptibly into the anterior and outer lips; operculum brown, two-whorled- 
horny, having a spirally striated glaze on the inner side and an elevated horny 
papilla at the nucleus, Alt. of shell, 12.0; of last whorl, 11.0; of aperture, 9.55 
max. diam. 11.0 mm. 
U. 8. 8. “ Albatross,” station 9783, off Southern Chile, in 199 fathoms, mud, 
bottom temperature 48°; station 2777, Magellan Strait, in 20 fathoms, gravel, 
and station 2808, near the Galapagos Islands, in 634 fathoms, coral sand, temper- 
ature 40°, the latter specimens fragmentary, Type, U. 8. N. Mus. 97,093, 
Rhipidoglossa. 
Bathysciadiidae. 
BATHYSCIADIUM DAUTZENBERG AND FISCHER. 
Bathysciadium D. and F., Bull. Soc. Zool. de France, 1901, 24, p. 207; type, B. coni- 
cum D. and F. 1. c. (= Lepeta costulata Locard, Talisman Rep, Moll. Test. 
1898, 2, p. 96, pl. 5, figs. 16, 17, 18). 
Lepeta (sp.) Locard. Exp. Sci. Trav. et Tal., Moll. Test., 1898, 2, p. 90. 
The species upon which this genus was founded was dredged off the Azores, by 
the Prince of Monaco, in 1888, in about 780 fathoms. 
The specimens were seated upon the remains of a Cephalopod beak; and, like 
the species from the Pacific about to be discussed, the several individuals had 
gnawed an excavation of the size of the base of the shell in the substance of their 
pedestal, over which they were seated. 
The B. costulatum is described as extremely thin and furnished with membran- 
ous periostraeum which does not appear to have been ciliated; the shell is sculp- 
tured with twenty radiating ribs which are very prominent, take origin about half- 
