15 
preserved in the Macleay Museum at the University of Sydney, and one 
other indifferent example in the Mining and Geological Museum. The 
identity of P. psila and P. socialis has already been discussed elsewhere, and 
need not he further referred to. The matrix, however, on which the little 
valves of P. are exposed is of interest, a soft bluish marl, as it is some- 
what similar to one met with in the Aramac AVell, Queensland, at a depth of 
two hundred and forty-four feet, and again at the Hergott Springs Bore, 
Central South Australia, at a depth of one hundred and fifty-five feet. 
The specimen in the Mining and Geological Museum is from the 
Wilcannia District, and is the external impression of a left valve, with a 
portion of the test adhering. The sculpture is displayed precisely as seen in 
two of the Queensland figures, and the size of the valve is hut little inferior. 
The sculpture consists of a large number of radiating, apparently flattened 
costae, increasing by bifurcation at about one-third of their length from the 
umbo, with the intervening valleys towards the front of the valve as wide, or 
perhaps even wider than the costae. There are also traces of fine close 
concentric lines, and the posterior ear is also radiate and concentrically 
marked. 
Log. — Well on Mount Stuart Bun, Co. Tongowoko, North-West N.S. 
Wales {II. Gilliatt) ; and two hundred and fifty miles from Wilcannia, near 
the Queensland border, North-West N.S. Wales (P. Von Lendenfeld). 
lIo)\ — Lower Cretaceous. 
Colin. — Macleay Museum, University of Sydney; and Mining and 
Geological Museum, Sydney. 
PSEUDAVICULA, JStli.fil., 1892. 
(Geol. Pal. Q’lancl, &c., 1892, p. 419.) 
PSEUDAVICULA ANOMALA, Moore, SJ). 
(PI. VII, Fig. 11; PI. X, Fig. 4.) 
Lucinci? anonialci, Moore, Quart. Journ. Geol. Soc., 1870, XXVI, p. 450, t. 14, f. 4. 
Lucina anomala , Eth. fit. Cat Austr. Foss., 1878, p. 110. 
Iseudavicula anomala, Etfi. fit, Geol. Pat Q’land, &c., 1892, p. 450, t. 24, f. G, 8, and 11. 
Ohs. — Only two very fragmentary examples of this species are extant, 
a crushed right valve in the Macleay Museum, and portions of test in the 
* (ieot Pal. Q’land, &o., 1892, t, 21, f. 7 and 9. 
