from the South-Australian Tertiaries. 165 
are delicate, straight, and well marked laterally by the synapti- 
cule. The columella is small. 
Height =2; inch; breadth of calice 5; inch. 
Locality. Muddy Creek, South Australia. 
BRYOZOON. 
9. Cellepora Gambierensis, Busk. 
Locality. Muddy Creek, South Australia. 
ECHINODERMATA,. 
10. Hemipatagus Forbesit, Woods & Duncan. PI. VI. fig. 3. 
Spatangus Forbesi, Woods. 
Hemipatagus Hoffmanni, Goldf. sp. (Sturt). 
This common Echinoderm has been confounded both with the 
Hemipatagus Hoffmanni, Goldf., of Biinde, and with the Hemi- 
patagus Griynomensis, Agass., whose synonym, SpatangusOmalii, 
Galeotti, will be recognized as denoting a form described by 
E. Forbes in the Belgian Eocene. The Rev. J. Woods has called 
it Spatangus Forbesi; but I cannot find any description of it, 
although it is figured (p. 75, ‘South Australia,’ Woods). The 
species is clearly not H. Hoffmanni, and Sturt’s mistake was cor- 
rected by Mr. Woods. Mr. Woods having figured the species, 
I append his name with my own. 
Test depressed, rather cordiform, nearly as broad as long,rounded 
and sulcated in front, rather angular laterally and truncated pos- 
teriorly. It is highest posteriorly, where it is roof-shaped; and it 
slopes gradually anteriorly. The ambulacral summit is nearly cen- 
tral. Inferiorly the test is slightly concave and irregular; the 
plastron is smoother than the rest ; the peristome is transverse, 
semilunar, and there is a prominent posterior lip. The anterior 
sulcus is broad, shallow, and rounded. The ambulacral areas are 
lanceolate, the anterior being wide apart. The poriferous zones 
are sunken and broad ; the pores are conjugate ; the interpori- 
ferous zones are slightly raised, and are faintly tuberculated. 
There are four generative pores, the anterior pair being closer 
than the posterior. There are no large tubercles in the posterior 
interambulacral space or in the posterior third of the central 
space ; they are large and few in the rest of the interambulacral 
spaces. The very small tubercles of the posterior space are very 
crowded. The large tubercles which are seen inferiorly also are 
nearly cylindrical, perforate, but not crenulate; the scrobicula 
is deep, and the tubercles are often in contact with one part of 
the scrobicular circle. 
Height of specimens 4 inch, length 1 inch. 
Locality. The Murray, Mount Gambier, South Australia. 
Coll. Geol. Soc. 
