74 A MONOGRAPH OF THE TERTIARY POLTZOA OP VICTORIA. 



Waters figures this species from Mount Gambier, referring it to the European 

 L. foliacea. In his Bairnsdale paper he says it may possibly have to be specifically 

 separated. Judging from the descriptions and the specimens of L. foliacea I have 

 examined, I see no reason for referring it to that species, and therefore describe it 

 as new. 



10. L. hebetata, Waters, sp. PI. VIII., fig. 7. 



Monoporella hebetata, Waters, Q.J.G.S., 1882, p. 271. 



Zoarium unilaminate, jorobably encrusting. Zooecia distinct, rounded, with 

 numerous large, close, round pores ; thyrostome arched above, contracted below, the 

 lower lip straight, a small internal denticle at eacb angle, and several spines on the 

 upper margin ; a pore or depression, seemingly avicularian, on each side of the 

 thyrostome. Posterior surface having the zooecia indistinct, with numerous small 

 perforated tubercles probably for the attachment of radical tubes. 



M. 



The specimen figured does not shew the internal denticles of the thyrostome, 

 but in another they are distinct. The form of tlie thyrostome and the presence of 

 the denticles shew that it should be referred to Lepralia. 



11. L. crassatina, Waters, sp. PI. VIII. , fig. 4. 



Monoporella crassatina, Waters, Q.J.G.S., 1882, p. 270. 



Zoarium bilaminate. Zooecia distinct, separated by grooves, the margins 

 occasionally very slightly raised, more or less hexagonal, surface with numerous 

 rather small pores ; thyrostome large, rounded above, straight below, situated a little 

 below the upper extremity of the zooecium ; peristome slightly thickened. 



M.O. ; M. Living. New Zealand. 



There may be some doubt as to the proper systematic position of this species. 

 On the whole it seems to me to belong to Lepralia. Waters places it and the last 

 species, as well as Macnopora c'arkei, in Monoporella, a genus proposed by Hincks 

 for the reception of two species from Bass's Straits, M. nodulifera and M. lepida, to 

 which he subsequently added M. albicans from Singapore and M. brunnea from 

 Queen Charlotte Islands. Of these M. lepida is clearly a Micropora, while M. albicans 

 should probably go to Cellepora, where it has already been placed by Waters. 

 M. nodulosa might be taken as the type of a genus, with which, however, M. brunnea 

 could scarcely be associated. 



12. L. cava, n.sp. PL X., fig. 23. 



Zoarium unilaminate, expanded and calyculate. Zooecia nearly ovate, irre- 

 gularly arranged, concave, with thickened raised margins ; surface with numerous 



