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., pl. vii., f. o and ». 
Sub-order RHACHIGLOSSA. 
Dentition, 0-1-0. j 
Fam. Marginellide. 
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., pl. 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 subeylindrical, outer lip not thickened. 
ManGINELLA INFANS, Reeve, Conch. Icon., f. 150 (1865); M. albescens, 
Hutton, Cat. Marine Moll. of N.Z., p. 19 (1873); Erato pellucida, Tenison- 
Woods, Pro. Roy. 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. Volutide. 
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 auterior of which are 
larger. Operculum usually absent.t 
* The following species is omitted as not really inhabiting New Zealand :— 
Marginella vittata, Hutton (= M. de burghie, Adams). Inhabits Australia. 
+ The © species are omitted as not really inhabiting New Zealand :— 
luta kirki, Hutton (=flavicans). Inhabits N. Australia. 
Folio kaupii, Dunker. Habitat unknown, 
