338 bulletin: museum of comparative zoology. 



U. S. S. " Albatross," station 2807, near the Galapagos Islands, in 812 fath- 

 oms, ooze, bottom temperature 3S°.4 F. U. S. N. Mus. 96,481. 



This shell recalls Natica impervia Philippi, but is proportionately wider, and has 

 a horny operculum, while according to Strebel Pbilippi's species belongs to Cryp- 

 touatica, having a smooth shelly operculum. 



Polinices (Euspira) strebeli Dall, 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 tlie 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, 

 iug 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, 9-5; 

 max. diam. 11.0 mm. 



U. S. S. " Albatross," station 2783, off Southern Chile, in 122 fathoms, mud, 

 bottom temperature 48°; station 2777, Magellan Strait, in 20 fathoms, gravel, 

 and station 2308, near the Galapagos Islands, in 634 fathoms, coral sand, temper- 

 ature 40°, the latter specimens fragmentary. Type, U. S. N. Mus. 97,093. 



Rhipidoglossa. 

 Bathysciadiidae. 



BATHYSCIADIUITI Dautzenberg and Fischer. 



Bathysciadium D. and F., Bull See. ZooL de France, 1901, 24, p. 207 ; type, B. com- 

 cum D. and F. 1. c. (= Lepeta costulata Locard, Talisman Rep., Moll. Test., 

 1898, 2. p. 96, pi. 5, figs. 16, 17, IS). 



Lepeta (sp.) Locard. Exp. Sci. Trav. et Tal, Moll. Test., 1898, 2, p. 96. 



The species upon which this genus was founded was dredged off the Azores, by 

 the Priuce of Monaco, in 1SS8, 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 liad 

 guawcd an excavation of the size of the base of the shell in the substance of their 

 pedestal, over wjiich tliey were seated. 



The B. contulatum is described as extremely thin and furnished with mcnd)rnn- 

 ous periostracum which does not appear to have been ciliated ; the shell is sculp- 

 tured with twenty radiating ribs which arc very promiueut, take origin about half- 



