250 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 
rounded; lunule rather large, oval; concentric strie very numerous 
and regular. 
This shell approaches A. subtrigona, Mimst., but is too oblique 
for that shell, and possesses much more regular striations. 
From the Greenough river, Western Australia. 
31. ASTARTE WOLLUMBILLAENSIS, sp.n. Pl. XII. fig. 12. 
Shell small, thick, ovately orbicular, gibbous; umbones large, 
mesial; posterior side rather extended; anterior slightly oblique ; 
ventral margin rounded; shell covered with numerous regular con- 
centric rugse, with deepish interspaces, and with three or four inter- 
rupted folds of growth. 
Loc. Wollumbilla. 
32. CUCULLHA INFLATA, sp. n. PI. XIV. figs. 1 & 2. 
Shell very gibbous and inflated, longer than broad; umbones 
mesial, much raised, separate, and projecting over a hinge-line which 
is shorter than the greatest breadth of the valves; dorsal margin 
rounded; posterior and anterior ends much truncated, the former 
with an obtuse carina, which crosses from the umbo to the dorsal 
margin, towards which the shell is much angulated ; surface covered 
by numerous regular concentric strie, which are crossed by faint 
coste most distinct on the anterior side. 
The peculiarly gibbous and truncated form of this shell readily 
distinguishes it from all the other species of this genus. In its 
greatest width it does not exceed 2} inches, whilst, measuring from 
the umbo to the dorsal margin, it is 3} inches long, the diameter of 
the valves being about 23 inches. 
It is from the Greenough district. 
33. CUCULLMA SEMISTRIATA, Som, Je XODYs isle, Bi 
Shell transversely oblong; umbones anterior, rather depressed ; 
hinge-area bounded by a lanceolate striated space; posterior end 
lengthened, attenuated, and angulated, with an obtuse oblique carina; 
anterior end rather short and rounded ; surface covered by very fine 
concentric stri. 
This shell in its general form approaches C. oblonga, with which 
it is found; but it has a much finer ornamentation, and the radiating 
decussating strize appear nearly obsolete, and can only be detected 
by aid of the lens. 
From the Greenough district. 
34, CUCULLMA, sp. 
A third species is found with the above, to be distinguished by its 
being much narrower or transversely elongated; but neither of two 
examples are sufficiently perfect for description. C. oblonga is the 
most frequent of this genus ; so that four species occur in the Oolite 
of Western Australia. 
35. CyrHprrea CrarKer, sp.n. Pl, XIII. fig. 1. 
Shell large, thick, rather compressed, transyersely ovate, inequi- 
