Helicide of New Zealand, Tasmania, and South Africa. 65 
It is a most astonishing fact how close the relation between 
the Tasmanian and New Zealand molluscan fauna really 
js, more so than I ever anticipated. Of nine sections of 
the genus Llammulina occurring in New Zealand, five are 
represented in Tasmania. Most remarkable is the prepon- 
derance of Gerontia, a section represented in New Zealand 
by two species only, and of Phriagnathus, which is also well 
represented in New Zealand. A very striking feature is the 
almost total absence of Hndodonta, the Polynesian element, 
there being only one species of Hndodonta, s. str., and one of 
Charopa known from ‘Tasmania. Lhytida is more abundant 
in Tasmania, whilst henea is represented by two species in 
each country. 
With regard to the relation between the land molluscan 
fauna of New Zealand, Tasmania, and South Africa, I 
do not know much at present; yet the little knowledge 
available seems of great importance. The genus LHrope 
is no doubt nearly allied to Rhytida; but the most 
important fact has been brought to our knowledge by the 
examination of the dentition and part of the animal of 
Pella Burnupi, M. & P. The authors of this species state 
that it is of allied character to P. bésculpta, Benson, the type 
of fella, and the dentition given may therefore be taken as 
typical for the section or genus. I have studied the dentition 
of most of the New Zealand land and freshwater shells, and, 
as shown above, of a good many from: Tasmania, and I 
may therefore be allowed to give my opinion as to the 
systematic position of Pella Burnupt, M. & P., and Pella 
generally. I have not the slightest doubt that it must be 
classed under Haplogona next to Flammulina. 
The dentition and part of the animal which I was able to 
examine closely resemble those of Flammulina, s. str., and 
Gerontia from New Zealand and ‘lasmania ; and I think that 
the South-African genus Pella belongs to the Antarctic mol- 
luscan fauna, which no doubt datés back to the Cretaceous 
period at least. 
There are other South-African Jand-shells which seem 
tome to be more or less closely allied to forms from New 
Zealand, and I hope to obtain the animals for examination, — 
[With regard to the genus Pella, as alluded to in the atove 
article, we would refer our readers to the remarks made by 
Mr, Pilsbry in the « Manual of Conchology,’ vol. viii. pp. 155 et seq.— 
Eps. Ann. § Mag. Nat. Hist.| 
