FOSSILS FROM THE PALZOZOIC ROCKS OF N.S8.W. 257 
been kind enough to examine this and he considers the deter- 
mination to be correct, but taking into consideration the state of 
servation it is perhaps better to express the determination with 
a note of interrogation. e specimen is small, about the size of the 
variety fig from Craighead Quarry, near Girvan,’ and some- 
what resembles this. The radiating semi-ribs are numerous and 
crossed by a large number of the fluctuating crenulations seen in _ 
8. rhomboidalis. 2 
ee, 
The species has been met with before in New South Wales, at 
Rock Flat Creek, by the Rev. W. B. Clarke.’ oa 
Loe. and horizon—Bombala, in a mudstone.of Silurian age. “ad 
ot re i] 
1 Monograph, loc. cit., t. 44, f. 1 a and b. if 
* De Koninck, loc. cit., p. 28. oe 
zs 
