1894. PROCEEDINGS OF THE NATIONAL MUSEUM. 677 



Subgenus Sabatia, 15 c 1 1 a r d i. 



SABATIA PUSTULOSA, new species. 



Plate xx^a, fig. 10. 



Sliell solid, large, subpyriform, with wbollj' immersed spire and 

 granular callous body lip; surface polished, sculptured by deep, ratlier 

 wide, cliauneled grooves; punctate, but with the punctures overlapping 

 one another so that the line presents an annulate aspect. There are a 

 few intercalary, fine impuuctate lines also. The form of the shell is 

 rather rounded, smaller posteriorly, with an obscure constriction about 

 the middle of the shell; ai)ex dimpled, but imperforate; aperture 

 narrow behind, wide and rounded in front; outer lip thin, raised above 

 the apex, but hardly alate; inner lip thick, callous, with numerous 

 pustules, the axis barely pervious; i)illar tliick, pustular, its outer edge 

 high, with a groove behind it, but no umbilical chink. Extreme length 

 of shell, 33; maximum diameter, 20 mm. 



Station 3472, in 295 fathoms, one dead and discolored specimen. Xo. 

 107012, U.S.KM. 



This species recalls the more inflated Scaphander niveus, Watson, 

 from near the Philippines, but is readily distinguished by its more 

 attenuated Bnlbj-Yika form. It may, when older, exhibit a more promi- 

 nent body callus than is shown by our specimen, the granulation of 

 the pillar being much like that of adolescent specimens of Sabatia 

 hathymopMUi., Ball, from the deeper waters of the Antilles. 



Genus P L E U R O T M A, Lamarck. 



PLEUROTOMA (DRILLIA) MICROSCELIDA, new species. 



Shell with six or more whorls (all the specimens decollate), solid, white, 

 with an ashy pale-brown epidermis; aperture less than half the length 

 of the shell; suture distinct, not channeled; anal notch rather anterior, 

 about as deep as wide, separated from the suture behind by a somewhat 

 excavated area; spiral sculpture ot, in front of the suture, a plain, 

 strong thread, in front of that three or four anteriorly diminishing 

 threads; the anal fasciole, contrary to the ordinary rule, projects, show- 

 ing two small distinct adjacent threads, which overrun and somewhat 

 uodulate numerous short abrupt peripheral wavelets; in front of the 

 fasciole three strong alternate with three feeble revolving threads, and 

 still in front of these six or eight small threads occupy the base; the 

 siphonal part is decorticated. The transverse sculpture is composed of 

 the peripheral wavelets before alluded to, which are rather close set 

 and about 21 in number, on the penultimate whorl ; there is no other 

 transverse sculpture except lines of growth, which are not very j)romi- 

 nent; aperture narrow, with a relatively wide canal; pillar solid, slen- 

 der, and somewhat twisted; body not callous, and with no subsutural 

 callosity; interior of aperture not lirate; length of five (decollate) whorls, 



