S.A. NAT.. 
VOL. XVJll. No. 2 
By TOM IRKD.VLE. 1'). 
Genus Eremopeas. 
1906. Eremopeas Pilsbrv, Man. Conch. (Tryon), Ser. 2, Vol 
XVIII, (pt. 70),^ p.ll5, April 10. 
Orthotype Stenogyra interioris Tate. 
The shells belonging to this family are so alike in appearance 
that a compound microscope is necessary to examine the detailed 
sculpture. In the group the protoconch will then be seen to be 
.spirally striate, a feature otherwse only seen in African and South 
American shells, which are not closely related. Shell lengthened, 
:8-10 mm. long, with a width of 2 to 2.5 mm., awl shaped, apex 
fclunt, surface very finely radially striate, surface glossy, mouth a 
■small oval, umbilical chink present. 
Eremopeas interioris. PI. I, fig. 5. 
1894. Stenogyra interioris Tate, Trans. Roy. Soc. South Austr., 
Vol. XVIII, p.l91, November; Central Australia. 
1896. Rep. Horn Sci. Exped. Centr. Austr., pt. II, Zool., p.203, 
p-1. XVIII, fig. 14, February. Common: Harts Range 
to Stokes’ Pass, and from MacDonnell Range to Ilpilla 
Gorge. 
Family Succineidae. 
The members of this family are widely spread, but do not 
occur in New Zealand. The amber appearance is unmistakable 
and their shape and tenuity are peculiar, but they are often 
mistaken for freshwater Limneoids, whose similar shells are 
inhabited by an entirely different animal. Recent investigations 
of the animals of the members of the family Succineidae have 
■shown that these differ essentially much more than the shell, and 
until the animals of the Australian forms are critically examined 
bv expert anatomists, their interrelationship must remain obscure. 
Two genera only are recognised at present from conchological 
.features, but nothing definite is available yet. 
Key to Species. 
Shell with rather lengthened narrow spire, large body whorl, 
thin outer lip, and thin texture throughout 
Austrosuccivea, 
Shell with shorter spire, body whorl more bulky, and of an 
arboreal nature A rborcinea. 
