38 
Examples of this form of shell are frequent in our Cretaceous rocks, 
but always in a very indifferent state of preservation and without any 
decipherahle hinge characters. They arc referred to 3IaC7'ocallista with 
feelings of considerable doubt and hesitation. 
Log. — AVaratta Creek, near Mount Poole, North-West N. S. AVales 
{C. S. TFilkinsou). 
Ilor. — Lower Cretaceous. 
— Mining and Geological Museum, Sydney. 
Genus — COllIMYA, Agassiz, 1842. 
(Etudes critiques IMoll. Foss., 1842, 3' Livr., p. 202.) 
CoiiiMYA ? PRIMULA, Iliidleston, sp. 
(PL III, Figs. 8 and 9.) 
Thi'cicia puimula, Hudleston, Grcol. Mag., 1890, YII (3), p. 245, t. 9, f. 7. 
Corimya primula, Eth. fd., Geol. Pal. Q’laud, &c., 1892, p. 481, t. 28, f. 11. 
Ohs. — Two internal casts are known to me from our Cretaceous 
deposits. Both are much compressed and devoid of test, and neither 
absolutely perfect ; it was clearly a very delicate and fragile shell. There is 
evidence of the existence of an escutcheon in both specimens, and in one 
traces of a ligament, but a pallial impression is quite imperceptible in both. 
The concentric laminations of the shell are visil)le on the surfaces of both 
casts. 
Log. — Mt. Stuart Bun, Co. Tongowoko, North-West N. S. Mmles 
{II. Gilliatt) ; ]\[ount Brown District, near Milparinka, North-lYest N. S. 
M^ales. 
7/or. — Lmver Cretaceous. 
Colin. — Macleay Museum, University of Sydney ; and Mining and 
Geological Museum, Sydney. 
Ge?ius — GLYCIMERIS {Klein), Lamarok, 1799. 
(Prodrome — Mem. Soc. Hist. Nat. Paris, 1799, p. 83.) 
Glycimeris obesus, sp. nov. 
(PI. V, Figs. 10 and 11.) 
Sp. Char. — Shell rotund, inflated, and inequilateral, gaping at both 
extremities. Anterior ends small, the margins obliquely rounded ; posterior 
