11 
Ammodiscus anceps, Brady , sp. 
(Plate 3, Fig. 1.) 
Trochammina anceps , Brady, 1876, Carb. and Perm. Foram. (Pal. Soc. Mon.), p. 76, 
PI. nr, Figs. 8a, b. 
AmmodisCllS anceps , (Brady), Chapman, 1895, Ann. Mag. Xat. Hist., eer. 6, vol. XYI, 
p. 316, PI. XI, Figs. 10a, b. 
Observations . — The specimen figured is typical, and agrees more cdosely 
with the original figure than the Rhsetic specimens from Wed more, the latter 
being relatively thinner and more compressed. The previous records are 
from the Carboniferous, Kinetic and Lias. 
Occurrence. — In washings from the Pokolbin limestone. 
? Ammodiscus, sp. 
(Plate 1, Fig. 12a, c.) 
Observations . — It is impossible to more than tentatively indicate the 
affinity of this curious little fossil. The finely arenaceous structure and 
symmetrical shape, with its cavernous interior, seem to point in the direction 
of Ammodiscus. The projecting portion of the test seen in the figure suggests 
that it formed the apertural end of an internal flattened tube. 
Occurrence. — From the decomposed limestone of Wollong. 
Genus — STACIIEIA, Brady (emend. Chapm.). 
Stacheia simulans, sp. nov. 
(Plate 2, Fig. 4.) 
Description . — Test variably sub-elliptical, moderately compressed ; the 
figured specimen roughly resembles in outline a spiral and rectilineally 
extended Haplophragmium. Surface corroded or marked by irregular 
depressions. Shell-texture sub-arenaceous, of medium fineness. Length of 
figured specimen, T4 mm. ; greatest width, ‘825 mm. 
Observations . — In shell- texture this form resembles S. cuspidata 1 
from the Rlimtic of Wedmore ; the latter differs, however, in having a sub- 
1 Ann. Mag. Nat. Hist., ser. 6, vol. XVI, 1895, p. 325, PL XII, Figs. 9, 10. 
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