410 RALPH TATE. 
shell posterior to the transverse sulcus carries thickish growth- 
folds and some coincident striae. Accessory valve roundly oblong, 
front margin semicircular, posterior margin truncate, slightly con- 
vex and smooth on the outside. Antero-posterior diameter 16, 
umbo-ventral diameter 8-5, transverse diameter of closed valves 
8 mm. ; transverse sulcus 5 mm. from the front. 
Miocene, Grangeburn, near Hamilton, Victoria ; burrowing in 
coral ( Plesiastrea ). 
From figures and description this fossil pholad comes near to 
Martesia elegans, Desh., of the Parisian Eocene; but M. elegantula 
has a longer posterior side, which is not so finely and regularly 
ridged, and the accessory valve is of a different shape. 
Class Ponyzoa. 
The voluminous monograph by McGillivray already referred 
to is almost entirely responsible for the very large additions to the 
genera and species comprised in our Eocene fauna. The census 
of the class is now eighty-four genera and four hundred and forty- 
four species representing a gain of forty-seven genera (many new); 
and two hundred and twenty-nine species. The additional genera 
are :— 
Order CHEILOSTOMATA. 
Liriozoa, one specimen; Bigemellaria, one sp. ; Stenostomarit, 
one sp.; Strophipora, one sp.; Microstomaria, one sp.; Caloporella, 
six spp.; Claviporella, four spp.; Ditaxipora, one sp.; Scrupocellaria 
one sp.; Plicopora, one sp.; Beania, one sp.; Craspedozoum, one 
sp.; Amphiblestrum, eight spp.; Farcimia, three spp.; Oaleschara, 
one sp.; Lhalamoporella, two spp.; Macropora, two spp-; Mem 
braniporella, two spp.; Oorbulipora, one sp.; Hiantopora, four 8pP-) 
Tessaradoma, two spp.; Adeona, six spp.; Bulbipora, one SP. 
Plagiopora, one sp.; Gemellipora, two spp.; Haswellia, two SPP 
Bipora, two spp.; Adeonella, one sp.; Oucullipora, one sp.; Pachy- 
stomaria, one sp.; Phylactella, one sp.; Bracebridgia, one P+) 
Aspidostoma, one sp.; Tubicellaria, two spp.; Prostomaria, one 8P-3 
Bitectipora, one sp.; Schismopora, five spp. 
