OF NEW SOUTH WALES. 99 



has not been identified since the author's description as far as I 

 can learn. The coral itself was completely embedded in the 

 foliations of the Escliara which had to be broken away in order 

 to extract it. It is 14 millim high, major axis of calice 9, 

 minor 7. 



In the depth of the fossa, smallness of columella, granular 

 septa and absence of epitheca, this species comes nearest to the 

 tertiary fossil from Muddy Creek B. tuhuUformis, Duncan, but in 

 that species the higher orders do not unite. 



I am not aware whether any other instances are known of corals 

 growing on tufts of Polyzoa, but as this has been found, collectors 

 will probably make a more diligent search, as the specimen of 

 Eschara has been a long time in the Macleayan Museum, and had 

 been many times handled by me before the existence of the 

 Balanophyllia was observed. The Eschara in question grows on 

 rocks and stones in comparatively shallow water, and the growth 

 is very rapid. A specimen grew to a tuft about 6 inches high, 

 and spread about 9 inches in every direction on the anchor chain 

 of a vessel that was exactly three months in harbor. 



EXPLANATION OF PLATE 10. 



Fig, 1. — Balanophyllia dentata, slightly enlarged. 



Fig. la. — ditto ditto calice 



Fig. 2. — Phyllopora spinnsa, nat. size. 



Fig. 2a. — ditto ditto part of branch magnified. 



Fig. 3. — Vasillu7n tuberculatum, slightly enlarged. 



Fig. 3a. — ditto ditto calice. 



Fig. 3b. — ditto ditto base. 



Fig. 4. — Diechorcea boletiformis, enlarged 4 diameters. 



Fig. 4a. — ditto ditto calice. 



