246 
The specific name euglypta (well-carved), is in allusion to the 
bold sculpture of the shell. 
Affnities.—This species, in respect of sculpture and shape, 
comes nearest to Helix (Rhagada) Bordaensis, Angas, 1880. It 
differs from it by larger size, relatively deeper (so that the aper- 
ture is different in outline), the spire slightly elevated, the cor- 
rugations stronger, more distant and crenulated, and by smaller 
umbilicus. The type of G. Bordaensis seems not to be adult ; 
and all examples known to me of .the size of the type have four 
whorls, not five as stated by Angas ; and as indicative that the 
adult stage has not yet been reached, the body-whorl does not 
show descension at the front, or the margin of the aperture any 
reflection, or little or none of the columella. 
Angasella polypleura, spec. nov. Pl. vi., figs. 2a-2c. 
I have always been dubious as to the correctness of my refer- 
ence to Helix cyrtopleura, Pf., of a helicoid snail collected by me 
in 1878, on the Bunda Plateau of the Great Australian Bight. 
Authentic specimens of Pfeiffer’s species are not extant in any 
cabinet in Australia, and I cannot learn that the shell has been 
retaken at the original locality, “ Plains near Lake Torrens.” 
The geographical isolation of the two shells, 400 miles apart, 
with no species of Angasella in the intervening area, was sugges- 
tive of specific distinctness. Pfeiffer’s description and figure are 
not detailed enough for safe determination of an allied species ; 
but during my visit to England in 1896, I made actual com- 
parisons of the Bunda shell with the type and cotypes of 
H. crytopleura in the Natural History Museum, London, with the 
result that in my opinion they are not conspecific. The new 
species has a more inflated body-whorl and more numerous riblets. 
[This is from memory, as my notes on the detailed differences 
have been lost. | 
The following are the chief characters of A. polypleura :— 
Colour in life light-brown becoming sordid-white on the body- 
whorl. The body-whorl much descends in front, and is orna- 
mented with about sixty sigmoid thread-like ribs the intercostal 
spaces are coarsely granular, the granules having a tendency to 
coalesce to form rugae. The peristome is largely and acutely 
reflected, and its margins joined by a thick adnate callus ; the 
columella is arched and broadly and thickly reflected over part of 
the umbilical crater. The elevation of the spire varies from 
almost flat to as much as 4°5 mm. above the plane of the last 
whorl towards the front. The embryonic part, which consists of 
two turns, is relatively large and smooth (as seen under a pocket 
lense). 
re average of the measurements of three fairly typical speci- 
