MOMAISCA — HKI^MCY. 



.•{33 



l^'roin 22 fathoms oft" the Manning River, and fi'oni 24-27 

 fathoms in the iiortli end of tlie Newcastle Bight. 



MJNOLIA BELLULA, Am/as. 



Minolla bellula, Angas, Proc. Zool. See, 1869, p. 4<S, pi. ii., f. 11. 



Station 28. 

 One specimen f i-om 22 fathoms off the Manning River. 



MINOLIA ARATA, sp. nov. 



(Fig. 65.) 



Stations 37, 44. 



Shell turbinate, widely unibilicate, rather thin. Colour jjale 

 yellow, with purple disposed in dots on the shoulder and stripes 

 on the base. Whorls five, tabulate above, angled at the shoulder, 

 thence rounded, last in slight 

 contact with its predecessor ; 

 sutures impressed. Sculpture: 

 the flat sutural shelf of the 

 upper whorls is ornamented by 

 fine regular radial riblets ; ob- 

 liquely descending the slope 

 these riblets crenulate the upper 

 spirals and gradually vanish on 

 the last whorl into faint irregu- 

 larly spaced growth lines. On 

 the upper whorls are five spiral 

 cords, between which are 

 smaller threads, in their turn 



Fig. 65. 



separating still finer lines. The last whorl is encircled by ten 

 strong keels whose interstices are occupied by small and smaller 

 threads as before. Apex elevated, of two whorls small and 

 glossy. Umbilicus wide and deep, penetrated by five elevated 

 spiral ridges beaded by longitudinal sculpture. Aperture circular, 

 slightly oblique, peristome entire, simple, sharp, within brilliantly 

 nacreous, nacre edged with a thin brown and a broader yellow 

 non-nacreous margin. Major diam., 9-5 ; minor diam., 7'5 ; 

 height, 7 mm. 



This species is allied to M. jiulcherrima, Angas, and M. rosu- 

 lenta, Watson, than which it is of duller hue and of weaker I'adial 

 sculpture. 



