SuTEE. — On New Zealand MoUusca. 271 



flat or elevated, umbilicated or imperforate ; peristome acute ; 

 aperture without lamellee ; epidermis smooth or ribbed, seldom 

 hairy. 



The genera I include in the family of the Phenacohelicidge 

 are the following: PJiacussa, Thalassia, Gerontia, Psijra, 

 Pijrrka, Therasia, Phenacohelix, Patulopsis, AmpJiidoxa, and 

 Calymna. They are in such a succession that PJiacussa 

 stands nearest to the Lunacidae, and Amphidoxa, with Calymna, 

 nearest to the Patulid^. 



On examining the dentition of Diplomjohalus subantialba, 

 mihi, and D. biconcava, Pf., I have satisfied myself that I was 

 mistaken when I placed several of our shells in this genus 

 (Trans. N.Z. Inst., vol. xxii., p. 226), as there is a jaw, and 

 consequently the radula is quite different from that of 

 Diplomphalus. 



With regard to the genus Hyalina I am more doubtful 

 than ever. The species -H". microreticidata , mihi, and H. allo- 

 chroida, mihi (Trans. N.Z. Inst., vol. xxii., p. 227, 228), very 

 likely belong to another genus ; but as long as I have not had 

 an opportunity of examining the animal I must defer settling 

 the question. 



The examination of the dentition of Endodonta leimonias, 

 E. 2)oecilosticta, and E. marina decidedly shows that these 

 shells must be included in Phrlxgnathus, Hutt., and do not 

 belong to Endodonta. The group Laoma was established by 

 Gray in 1849 for Bui. leimonias, and I propose tu retain it lor 

 the shells mentioned, as a subgenus of Phrixgnathus. This 

 subgenus includes those species of Phrixgnathus which are 

 provided with spiral lamina? and teeth in the aperture. 



I wish to give complete lists of the land and fresh-water 

 molluscs I found in two different places of this colony, at each 

 of which I have been collecting occasionally during about one 

 year and a half. 



I. — Molluscan Fauna of the Vicinity of Hastwell, Forty - 

 mile Bush, North Island. 



Class GASTEROPODA. Ord. PULMONATA. 

 Group STYLOMMATOPHOEA. 



Sec. Agnatha. 

 Fam. Testacellidse. 



1. Elcea coresia, Gray. Very scarce. Found only one 

 specimen, amongst dead leaves in the bush near jMauriceville. 



Sec. Gnathophora. (a.) Holognatha. 

 Fam. Limacidae. 



2. Amalia marginata, Hutt. Eare. Two specimens only 

 ■were obtained, in the bush near Hastwell. 



