bo THE NAUTILUS. 



ous tail gland, which is not the case. Moreover, the jaw in Endo- 

 donta and Charopa is only striated, whilst stegognath in Gerontia, 

 and the radula in the latter is more or less distinctly pseudozon- 

 itoid. I am of opinion that the separation of Gerontia from Endo- 

 donta is fully justified ; the patuloid shells being inchided in Endo- 

 donta, whilst the more zonitoid forms are embraced in Gerordia. 



Mr. Charles Hedley and the writer substituted von Martens' 

 Flammulina for Amphidoxa of N. Z. authors, and as the genus of 

 von Martens dates from 1<S73, it must be used as the generic name 

 instead of Gerontia (1883). 



The classification of the New Zealand Helicidc^e I propose, follow- 

 ing chiefly Mr. H. A. Pilsbry, is the following : 



Group Haplogona Pilsbry. 

 1. Genus Flammulina (von Martens) Suter. 



Sections: (1) Flammulina v. Mart. s. str. ; (2) Gerontia Hutt. ; 

 (3) Phacussa Hutt. ; (4) Therasia Hutt. ; (5) Pyrrha Hutt. ; (6) 

 Phenacohelix Sut. ; (7) Allodiscus Pils. ; (8) Suter ia Pils. ; (9) 

 Thalassohelix Pils. 



2. Genus Endodonta (Albers) Pilsbry. 



Sections: (1) Endodonta Albers," s. str.; subsect. Ptychodon 

 Ancey ; (2) C'Aaro;:»« Albers ; subsections, a. re.sse?'a7-ia Bottger ; b. 

 Aeschrodomvs Pils. 



Group PoLYPLACOGNATiiA Pilsbry. 



Genus Laama (Gray) Pilsbry. 

 Sections : (1) L'toma Gray, s. str. ; (2) Phrixgnathus Hiitton. 



Giving now the classification of the Tasmanian land shells ex- 

 amined, I wish to point out that it is based on the dentition as well 

 as on the shell characters ; their number, is thirty-two. 



Genus Flummtdina (von Mart.) Suter. 



Sect. Flamviuliaa von Marten.*, s. str. 



■ (1) F. jungermanniae Petterd. (3) F. luckmani Brazier. 

 (2) F. sitiens Cox. 



