300 Transactions. 



beaded ridge margining the umbilicus. Colour whitish with 

 irregular radiate zigzag bands of purple. Spire low, with a 

 blunt apex. Nucleus smooth, rather large, depressed-globular, 

 yellowish, consisting of one whorl. Whorls 3|, shouldered, 

 convex at the periphery ; base flatly convex. Suture sub- 

 canaliculate. Aperture subcircular, very little excavated above, 

 the margins approaching and nearly meeting, slightly nacreous 

 within. Outer lip sharp, convex. Inner lip forming a very 

 thin layer over the penultimate whorl ; columella regularly 

 arched, slightly reflexed, produced at the base on joining the 

 carina of the umbilicus. Umbilicus wide, carinate, perspective, 

 with spiral ridges and longitudinal plications on the last whorl. 

 Diameter : maximum, 4 - 5 mm. ; minimum, 3"8 mm. Altitude, 

 3 mm. 



Type in the Colonial Museum, Wellington. 



Obs. A few dead and mostly young shells. As type we 

 selected a specimen obtained by Captain J. Bollons by dredging 

 in 37 fathoms off Cuvier Island, as it is in better condition than 

 any of those from 110 fathoms. This species is easily separated 

 from the foregoing species by the less elaborate sculpture alone. 



52. Monilea egena, Gould. 

 Proc. Boston Soc. Nat. Hist., vol. iii, 1849, p. 84. 

 One dead and imperfect shell. 



53. Cirsonella granum, n. sp. Plate XXVII, figs. 50, 51. 



Shell minute, turbinate, umbilicate, smooth and glossy. 

 Sculpture absent except for the microscopic growth - stria?. 

 Colour white, one young and apparently fresh specimen vitreous. 

 Spire conoidal, small, a little less than the total height. Nucleus 

 consists of one whorl, which is smooth and rounded. Whorls 4, 

 much rounded, the last proportionately large ; base convex. 

 Suture deep. Aperture subcircular, broadly angled above, but 

 little excavated by the body. Outer lip sharp, forming a half- 

 circle with the basal lip. Inner lip spread as a thin layer upon 

 the convex body, more thickened upon the concave and re- 

 flected columella. Umbilicus with its area small and with a 

 somewhat sharply defined margin, the perforation narrow. 

 Altitude, l - 75mm. ; diameter, T75 mm. 



Type in the Colonial Museum, Wellington. 



Obs. A few dead shells were gathered. It is a much smaller 

 shell than C. (?) neozelanica, Murdoch,* more globular, with the 

 aperture more circular, and better and differently defined um- 

 bilical area. 



* Proc. Mai. Soc, vol. iii, 1899, p. 320, pi. xvi, figs. 2-6. 



