RissoiA. 357 



R. QUiSQUiLiARUM, Watson. PI. 70, fig. 69. 



Imperforate, solid, smooth, except a few distant spiral stria? on the 

 base, apex obtuse ; whorls 5, convexly conical, suture slightly im- 

 pressed; li]) with a varix. Length, 1"5 mill. 



Off Fayed, Azores; 450-500 fms. 



R. Edwardeensis, Watson. PI. 70, fig. 70. 



Minutely riniate, rather thick, dull, smooth, ruddy horn color, 

 becoming whitish towards the mouth ; whorls 42, convex, the last 

 tumid ; outer lip thin, slightly patulous. Length, 0*75 mill. 



Off Prince Edward IsL; 50-150 fms. 

 R. siNAPi, Watson. PL 70, fig. 71. 



Imperforate, rather strong, smooth, reddish horn-color, with blunt 

 apex ; Avhorls 4, rapidly enlarging, convex, suture linear ; lip thin. 



Length, 1 mill. 



Royal Sound, Kerguelen IsL 



R. TRIANGULARIS, Watson. PI. 70, fig. 72. 



Umbilicated, smooth, white, apex blunt, suture impressed ; whorls 

 4'., raj^idly increasing, convex, base with an angle round the um- 

 bilicus ; lip thin, slightl)^ patulous. Length, 1 mill. 



Ascension Isl. ; 420 fms. 

 R. APiciXA, Verrill. PI. 71, fig. 85. 



Narrowly umbilicated, with acute, substyliform apex, striated by 

 growth-lines, smooth, dark brown ; nuclear whorls 4, normal whorls 

 5, convex, suture deeply impressed, last whoi'l with an indistinct 

 ridge below the perii)hery. Length, 7'6 mill. 



OffNeiv England Coast; 1608 fms. 



The animal has rather short, stout, tapering tentacles, and is ap- 

 parently without eyes. 

 R. LATiOR, Mighels and Adams. PI. 71, fig. 92. 



Narrowly umbilicated, smooth, pale horn-color, with deep suture ; 

 whorls 4, convex, rapidly enlarging ; aperture rounded, inner mar- 

 gin with a lamina. Length, 2 mill. 



New England. 



I am inclined to include in this species R. robusta, H. C. Lea, of 

 which a single specimen was obtained at Cape May, N. J. 

 R. Kergueleni, Smith. PI. 71, fig. 3. 



Imperforate, thin, vitreous or milk white, light brownish at the 

 apex, polished ; whorls 6, convex, apex obtuse, suture very narrowly 

 margined ; lip continuous, slightly thickened and expanded. 



Length, 3 mill. 



Kerguelen's Land. 



