224 Transactions. — Zoology. 



Hab. Auckland to Banks Peninsula. 



Small, olive brown with obscure chestnut-brown markings ; sometimes 

 altogether dark brown. There is no operculum. The animal and dentition 

 are figured in Trans. N.Z. Inst., xiv., pi. vii., f. o and p. 

 Sub-order Bhachiglossa. 



Dentition, 0-1-0. 



Fani. MarginellidcB. 



Animal with the side-lobes of the mantle expanded over the shell ; ten- 

 tacles approximated ; foot large, truncate in front, produced behind. - Oper- 

 culum usually absent. Shell polished, the spire short or immersed ; 

 columella plaited ; outer lip with a thickened margin.* 

 Genus Marginella, Lamarck. 



Spire short or concealed ; outer lip with a thick marginal varix, its 

 inner margin smooth or crenulated. Teeth with several cusps. 



Marginella muscaria, Lamarck, Anim. sans Vert. (1820) ; Tryon, Man. 

 Conch., v., pi. 6, f. 3; Erato lactea, Hutton, Man. N.Z. Moll., p. 63. 



Hab. Auckland and Cook Straits. Found also in S. Australia and 

 Tasmania. 



White or tinted with yellowish. 



The dentition is not known. 



Sub-genus Volvaria, Lamarck. 



Shell subcylindrical, outer lip not thickened. 



Marginella inpans, Eeeve, Conch. Icon., f. 150 (1865); M. albescens, 

 Hutton, Cat. Marine Moll, of N.Z. , p. 19 (1873) ; Erato pellucida, Tenison- 

 Woods, Pro. Koy. Soc. Tasmania, 1878, p. 34. 



Hab. Foveaux Straits, Chatham Islands. Found also in Tasmania, 

 and at Singapore. 



Translucent, white, occasionally with indications of two yellow spiral 

 bands ; columella with four plaits. 



The dentition is unknown. 



Our specimens are much smaller than the type and usually white. 



Fam. Volutidm. 



Animal with the mantle largely developed, covering the sides of the 

 shell ; tentacles far apart, united by a broad veil over the head. Shell not 

 porcellanous ; columella with distinct plaits, the anterior of which are 

 larger. Operculum usually absent.! 



* The following species is omitted as not really inhabiting New Zealand : — • 

 Marginella vittata, Hutton (= M. de bwrghice, Adams). Inhabits Australia. 



t The following species are omitted as not really inhabiting New Zealand : — ■ 

 Voluta. kirki, Hutton (=flavicans). Inhabits N. Australia. 

 Voluta kaupii, Dunker. Habitat unknown. 



