44 BULLETIN OF THE 



there is a thickening of the inside of the aperture all round, but least on the 

 pillar. Alt. 4.5. Maj. diam. 5.0. Diani. of aperture, 2.25 ; of uuiLilicus, 

 1.0 mm. 



Station 2, 805 fms. 



Margarita lubrica n. s. 



Shell small, conical, white, shining, with a .slight nacreous hue ; whorls five 

 full and rounded ; suture distinct ; from about the beginning of the third 

 whorl a row of round nodules extends along the upper line of the whorls just 

 below the suture, about twenty-five on the last whorl and more faintly de- 

 tined near the aperture ; base perforated by a small umbilicus bounded by a 

 thickened raised line, within which are al)0ut twelve plications extending up 

 into the umbilicus ; outside of this line a few radiating impressed lines extend 

 toward the outer part of the whorl ; faint lines of growth are here and there 

 visible on the polished surface ; aperture nearly circular, thin-edged, simple ; 

 the pillar slightly extended on the umbilical side, not thickened. Alt. 4.0. 

 Major diam. 3.25. Diam. of aperture, 1.5 ; of umbilicus, 0.5 mm. 



Station 2, 805 fms. 



This shell may possibly not be a Margarita, but there seems no other place 

 available for it. The minute nucleus and regular form preclude the idea of its 

 being the fry of something larger. 



Margarita (?) euspira n. s. 



Shell conical, shining, pearly white, elevated, with a rather obtu.se apex ; five- 

 whorled, the nucleus translucent, white, and with a sculpture of strong revolv- 

 ing threads, of which that nearest to the suture is most pronounced, and con- 

 tinues, at first sharp, then with .slight waves, then with oblique waves like the 

 "lay " of a stranded rope, and on the last whorl as a succession of well-elevated, 

 pinched-up points forming a band next the suture ; the others disappear on the 

 third whorl, and for the rest the shell is only marked by faint lines of growth 

 here and there a little more pronounced in the vicinity of the umbilical callus ; 

 periphery with a tendency to carination, base rounded ; aperture oblique, 

 rounded, margin sharp, simple, pillar stout, thick, inseparable from a thick 

 white callus which forms a lump over the umbilical pit ; end of pillar (broken 

 in specimens seen so far) apparently forming a sort of lump or thickened angle. 

 Suture distinct throughout. Alt. 5.75. Major diam. 6.0. Diam. of aperture, 

 3.0 mm. Defl. somewhat less than 90°. 



Station 2, 805 fms. 



Perhaps not a Margarita, but with no sufficient characters to justify its being 

 separated in the absence of soft parts. 



Calliostoma circumcinctum n. s. 



Shell solid, strong, white, elevated, conical, seven-whorled ; nucleus polished, 

 small, delicately reticulate ; other whorls with two .sharp, much produced, thin 



