406 RALPH TATE. 
Genus Puncturella, Lowe, 1827. 
PUNCTURELLA HEMIPSILA, spec. nov. (Plate 20, figs. 8 a, b.) 
Shell patelliform ; summit subspiral, recurved posteriorly ; anal 
slit in front of the apex, internally separated by a vertical septum 
from the apical fossa. Basal edge level, oval, plain. Ornamenta- 
tion of about seven narrow radiating riblets on the posterior half, 
the rest of the surface smooth. Anal slit narrow elliptic. Height 
2, diameters 4 and 2°5 mm. 
Eocene, Table Cape, Tasmania (two examples). 
This fossil resembles very much P. Harrisoni, Beddome, a living 
Australian shell, but is distinguished by much finer radial orna- 
ment, and by the more compressed lateral areas of the shell. 
The distribution of Puncturella is largely circumpolar and in 
deep water, and a few fossil species are known dating from the 
Miocene. 
Family ScurELLINID2. 
Genus Seutellina. 
Scutellina sp. Eocene, Muddy Creek. 
A single example only, but too much mutilated for specific 
determination ; it, however, is clearly referable to the genus by 
the posterior direction of the apex. 
Order PuLmonata. 
Genus Siphonaria. 
Example: One specimen, referable to this genus, I have from 
the Miocene, Gippsland. It has the shape and ornament of the 
living species §. diemenensis, Quoy & Gaimard, but the ribs are 
not so elevated, and the external ridge corresponding with the 
pulmonary groove is obselete. These differences may eventually 
prove to have specific value. 
Order OPISTHOBRANCHIATA. : 
M. Cossmann, in his monograph of the representatives of this 
order in the Older Tertiaries of Australia,’ distributes them ™ 
1 Trans. Roy. Soc., S. Aust., Vol. xx1., 1897. 
