224 Transactions. — Zoology. 



columella curved, lightly callused, and frequently a small denticle 

 at the anterior end. Length, 6 mm. ; breadth, 2-52 mm. 



The type locality is Stewart Island, the types preserved in 

 the Canterbury Museum. They would appear to be somewhat 

 larger than the northern forms. 



Columbella transitans, n. sp. Fig. 13. 



Shell small, fusiform, somewhat shining, with well-marked 

 spiral grooves usually less than half the breadth of the inter- 

 spaces. Colour light or dark brown, olive, or reddish-brown ; 

 some examples with a lighter band immediately below the sutures 

 and produced around the periphery, in others this band is darker 

 than the ground-colour. Whorls 6, rather flattened, the last 

 longer than the spire. Protoconch of two and a half whorls, 

 smooth and shining, light or dark olive, the apex usually lightest. 

 Sutures impressed. Sculpture : The penultimate whorl with 

 five or six and the last with seventeen to twenty-one spiral 

 grooves, six or seven of which are in front of the aperture : 

 occasionally a wider space surrounds the periphery, lightly cleft 

 with a minute groove ; longitudinally striate with irregular 

 growth-periods. Aperture oval. Outer lip simple, uniformly 

 curved. Columella lightly callused, the canal short and broad. 

 Length, 5'llmm. ; breadth, 2*14 mm. 



Type in the Colonial Museum. 



Bah. Whangaroa Harbour (Mr. A. Hamilton). 



From C. kuttoni, Suter, it maybe distinguished by its smaller 

 size, more numerous and much narrower spiral grooves. Its 

 sculpture suggests a position intermediate with that species and 

 the next form described. 



Columbella paxillus, n. sp. Fig. 14. 

 shell small, slender, smooth or with minute spiral grooves; 

 the last whorl lightly angled, only noticeable in front of the 

 aperture. Colour light -brown or reddish - brown or almost 

 black, the sutures occasionally a little lighter. Whorls 5J-6, 

 lightly convex, the Inst longer than the spire. Protoconch of 

 about two whorls, not well defined, apex polished. Sutures 

 impressed. Sculpture : A few small spirals on the anterior end 

 of bhe last whorl ; above tic periphery and on the spire minute, 

 irregular, or absent ; occasionally a few inconspicuous longi- 

 tudinal rihlets on the upper whorls of the spire. Aperture 

 short, oval. Outer lip simple. Columella curved and lightly 

 callused, the anterior canal short and broad. Length, 5*()1 nun. ; 

 breadth. I'-Ol mm. 



Type in the Colonial Museum. 



Hab. Wli Barbour (Mr. A. Hamilton); Whangarei 



