Hutton. — On the MoUuscan Fauna of Neiv Zealand. 131 



H. Haliotis iris. Teeth, a, a marginal tooth. 



I. Parmophorus unguis. Teeth. 



K. Acmcea conoidea. Teeth, a, plates ; b, side view of tooth. 



L. Acmcea corticata. Teeth, a, plates. 



M. Acmcea pileopsis. Teeth, a, plates; b, side view of tooth. 



N. Acmcea flamimea. Teeth, a, plates. 



Plate XVI. 



A. Patella magellanica. Teeth (removed on one side). 



B. Patella denticulata. Teeth, a, plates. 



C. Patella illuminata. Teeth. 



D. Patella olivacea. Teeth. 



E. Patella argyropsis. Teeth. 



F. Chiton glaucus. Teeth. 



G. Acanthochites zealandicus. Teeth. 

 H. Gryptoconchus porosus. Teeth. 



I. Chiton pellis-serpentis. Teeth. 



Art. VII. — Additions to the MoUuscan Fauna of New Zealand. 



By Professor F. W. Hutton. 

 [Read before the Philosophical Institute of Cayiterbury, 2nd March, 1882.] 

 POLYTEOPA CHEESEMANI, Sp. 110V. 



Shell small, fusiform, white, spirally ribbed, and between the ribs finely 

 transversely lirated. Whorls five, those of the spire small, with a single 

 smooth spiral rib ; body-whorl large, with five spiral grooves between the 

 ribs ; ribs broad and smooth, grooves narrow and transversely lirated. 

 Aperture moderate, contracted in front into a short, open, slightly-twisted 

 canal ; four or five short well-developed teeth inside the outer lip. In- 

 terior bright purple, without any white margin ; columella slightly tinted 

 with the same colour. 



Length -6 ; diameter -35 inch. 



Collected by Mr. T. F. Cheeseman at Port Waikato. 



I have seen a considerable number of specimens, and they exhibit very 

 little variation. The species is easily distinguished from P. striata by the 

 small number of grooves on the body-whorl ; and from P. squamata by the 

 smooth ribs, and the colour of the interior. From P. propinqua, Tenison- 

 Woods, it differs in having the grooves narrower, and one less of them, and 

 in the outer lip not being smooth. 



Pleueotoma (Drillia) awamoaensis, Hutton. Cat. Tertiary Mollusca of 

 New Zealand (1874), p. 4. 



Not uncommon at Waiwera, near Auckland (Cheeseman). 



Shell small, thin, fusiform, turretted, white ; whorls 8J, the first three or 

 three-and-a-half smooth and convex, afterwards slightly carinated, spirally 



