181 Transactions. — Zoolo<ii/. 



Operculum orbicular, thin, of many slowly increasing whorls ; nucleus 

 central ; horny, covered outside by a thin polished calcareous callus, 

 thickened round the margin, and with a prominent centre. 



Hab. Horokiwi, Wellington. 



IiEPTOPOMA (?) PALLIDA, n. S. 



Shell conical, sub -perforated ; pale brown. Spire acutely conical, the 

 apex obtusely rounded ; whorls 5-J, rounded, the last rather flattened at 

 the base, covered with a pale, thin, epidermis, which is rather closely 

 longitudinally plaited. The first two whorls show delicate oblique growth 

 lines ; suture impressed ; umbilicus very narrow, usually covered, not 

 keeled ; aperture slightly oblique, sub-circular ; peristome thin, regularly 

 arched, margins not meeting, columellar margin slightly reflexed. Oper- 

 culum (?). Height -2 ; diameter -13 inch. 



Hab. Auckland (T. F. Cheeseman). 



In the absence of the operculum, the true generic position of this shell 

 cannot be determined. 



EXPLANATION OF PLATES IX.— XI. 

 Plate IX. 



Fig. A. Helix hivi. Teeth x 470 times. 



B. Place-stylus hongi. Teeth x 160. 



C. Patula coma. Teeth X 470. 



D. „ buccinella. Teeth x 470. 



E. „ anguiculus. Teeth x 750. 



F. ,, corniculum. Teeth X 470. 



G. „ tapirina. Teeth x 470. 

 H. „ infecta. Teeth x 470. 



I. Gerontia pantherina. Teeth x 470. 



J. Gharopa planulata. Teeth x 470. 



K. Patula pilula. Teeth x 470. 

 L. Helix granum. Teeth x 470. 

 M. Therasia tliaisa. Teeth x 470. 

 N. ,, Valeria. Teeth x 470. 



O. Patula celinda. Teeth x 470. 



P. Strobila leioda. Teeth x 470. 



Q. Microphysa pumila. Teeth x 1,000. 

 E. Nanina maria. Teeth x 750. 

 S. Phrixgnathus marginatus. Teeth x 750. 

 T. Patula portia. Teeth x 470. 



U. Patula ida. Teeth x 280. 



V. Patula dimorpha. Teeth X 470. 

 W. Charopa miranda. Teeth X 470. 



X. Pfeifferia cressida. Teeth X 470. 

 Y. Vitrina dimidiata. Teeth X 470. 



Z. Paryphanta phlogophora. Teeth x 470. 



