44. 
LAND SHELIA 
S.A. NAT., 
A'OL. XVIII. No. 2. 
ed. These may prove to be representative of distinct groups as 
they live side by side in some localities. 
A series from Mt. Yardea, Gawler Range, are a little more 
flattened, though of the some coloration, the sculpture not quite 
so pronounced, and the umbilicus nearly closed: for these the 
ncAV name petuvi is introduced. PI. II, fig. 14. 
Sinumelon aversum sp. nov. PI. II, fig. 15. 
This well defined species from Blinman, Flinders Range, has 
been confused with godfreyi, and then jodinalis, but it Is related 
to neither, and Is more like jlindersi, only of a different color 
scheme. It is a little more depressed than typical jlhidersi, more 
solid, sculpture more irregular, the ribbing imperfect and not 
clear cut, the coloration very different. The shell is a dull brown,, 
paler around the umbilicus, the reflected columella almost closing 
that aperture. Width 18 mm., height 15 mm. 
Sinumelon perinflatum. 
1864. Helix perinflata Pfeiffer, Proc. Zool. Soc. (Lond.), 1863,. 
p.528, April 20 1864, ex Angas, p.520, nomen nudum^ 
^lacDonnell Ranges, Central Australia (Waterhouse). 
Figd. Cox, Mon. Austr. Land Shells, p.4S, pi. XX, fig, 2,. 
May 1868 (type figured by Angas). 
Angas’ figure does not portray the shell described by Pfeiffer, 
as it lacks the inflated appearance and also disagrees with the 
description, the altitude In the figure being greater than the 
width, while the measurements read: “Diameter, greatest 23.5 
mm., least 20 mm., height 20 mm.” Specimens generally Inflated 
have been collected at many places in the interior, and all called 
perinflatu?n. The material is not enough to name all the races, 
but the BIrksgate Ranges shell may be called impletum nov. 
PI. I, fie. 1. The shell is strongly inflated with about the measure- 
ments given by Pfeiffer, or a little broader, the spire short and 
conical, the sculpture fine irregular radials without any sign of de- 
cussation: the umbilicus shows as a narrow chink being nearly 
hidden by the reflected columella, body glaze marked. Shells, 
however, collected by Basedow and labelled Musgrave Ranges 
show a variation which mav be a place variation, as they are taller, 
less inflated than the Birksgate Ranges form, green, with the 
umbilicus closed completely by the appression of the columellar 
reflection. There Is no decussation and the growth stages are seen 
in darker markings. This may be called pedasum sp. nov. 
]M. II, fig. 2. 
