202 Transactions. — Zoology. 



PoLYTEopA STRIATA. Animal white. Siphon short, open helow. Foot 

 expanded anteriorly. 



Turbo smaeagdus. Animal a dark rich brownish black ; tentacles and 

 filaments lighter in the young. Filaments three on each side. 



EoTELLA. The animal of this genus is described by Gray in the " Annals 

 of Natural History," Series 2, Vol. 12, p. 179 ; and by Adams in the same 

 periodical, Series 8, Vol. 6, pp. 109 and 288. 



Anthora tiarata. Body white ; head purplish brown, with a broad 

 white longitudinal median band widening backward ; head lobes purplish 

 brown, margined with white ; proboscis purplish brown, tipped with a 

 white band, within which is a very dark band ; foot sooty brown, speckled 

 with white ; the posterior upper siu-face, behind the operculum, white, with 

 two rows of oblique black lines ; tentacles light purple ; eye peduncles 

 white or purplish ; side lappets transparent white, with opaque white spots. 

 Filaments four on each side, retractile into sheaths ; behind and below each 

 filament is a second shorter one. Tentacles and filaments fringed with 

 small retractile papillae, which are larger on the filaments. Sides of the 

 foot raised into a sharp margin. 



DiLOMA .^THiops. Foot black, margined with black and white transverse 

 lines, inside of which is a band of yellow dotted with black. Proboscis 

 black, margined with yellow ; head black, the inner head-lobes margined 

 with yellow below ; lower surface of eye peduncles yellow ; tentacles longi- 

 tudinally striped above with black and white. Filaments three on each 

 side, bluish. Body and sole of foot white. Mantle margined with green. 



ZizYPHiNus PUNCTULATUS. Foot ricli browu, speckled with white, the 

 sides deepening into dark brown, generally with some white spots; a row 

 of about six small white spots on each side of the anterior portion of 

 the foot ; side lobes the same as the foot. Top of the head rich brown ; 

 proboscis dark rich brown, tipped with white. Eye peduncles rich brown ; 

 tentacles pale brown. Side filaments four on each side, rich brown. Foot 

 with a raised margin on each side behind the operculum, emarginate in front. 



Cantharidus pupillus. Foot black, or dark brown variegated with white. 

 Head white with a black mark on the vertex, or black. Tentacles white, 

 or purple, or purple margined with white, or with three purplish longi- 

 tudinal stripes. Proboscis black, margined with yellow. Filaments three 

 on each side, white, or purplish ; both they and the tentacles fringed. 

 Foot fringed in front ; a pectinated side lobe between the tentacles and the 

 anterior filaments. Shell umbilicated or not umbilicated. 



This very variable species is abundant on seaweed in Lyttelton harbour. 

 It may periiaps be divided into three varieties ; but they run one into the 

 other. 



