CENSUS OF THE OLDER TERTIARY FAUNA OF AUSTRALIA. 405 
Genus Phasianotrochus, Fischer. 
This name is in substitution for Elenchus. 
Family, FissuRELLID2. 
Genus Lucapinella, Pilsbry, 1890. 
Example, Fissurella nigrita, Sow. Recent Australia and 
Miocene at Muddy Creek, Victoria. This generic name takes the 
Place of Fissurella in my Census. The genus is founded on 
anatomical characters, though conchologically some indication is 
afforded by the elevated ends of the shell. Fisswrella as restricted 
by Pilsbry is not represented in our Older Tertiary. 
Genus Subemarginula, Blainville. 
Shell like Emarginula, but the anal slit is more or less obsolete 
and there is no slit-fascia. 
SUBEMARGINULA OCCLUSA, spec. nov. (Plate 20, fig. 9.) 
Shell patelliform, summit a little behind the middle; apex 
directed backwards, spiral of one and a-half turns, slightly turned 
to the right. Basal edge of shell approximately level, oval in 
outline, crenulated. Ornamentation of numerous acute subequal 
radial ribs, studded with crenatures which are produced by the 
crossing of imbricating lamelle of growth ; there are about twenty 
ribs on the anterior half, and about ten primaries with alternating 
Secondaries on the posterior half of the shell. In the young shell, 
the interstitial ornament is of the usual fenestrated pattern and 
the ribs are surmounted by denticles. The anal notch is very 
Short in young shells, but obselete in the adult, though the slit 
band is traceable on the interior. Height 7-5, diameters 20 and 
18-5 
Eocene, Muddy Creek (very common) ; Mornington. 
. 
Subgenus Tugalia. 
Example, 7. crassirecticulata, Pritchard.’ 
Eocene, Table Cape. 
1 Proc. Roy. Soc., Vic., 1896, p. 125, t. 3, figs. 4-5. 
