138 A MONOGRAPH Or THE TERTIARY POLTZOA OF VICTORIA. 



J)ia.sfopo?'H discnidoa, jNfcO. PI. XX., fig. 3. 



Zonrium discoid, raised on a slii^lit stalk, l)asc flat; l)asal lamina finely 

 jxinctaie, and, in tlie only specimen, in jdaces fiiiely reliculately jjorous. ZocL'cia 

 airani;'('d in single broken rows wliicli rnn from the centre ontwai'ds in curved lin(>s. 

 Walls porous. Ai the edo'o the zocrcia hccouic uuich ci-owded, so as 1o t;ive the 

 entire margin a eaiiccliated appearance. Spaces l)(>t\veeii the zoocia covered by a 

 finely punctate transversely Avrinkhnl lamina. 



S.P. 



Liripora, McG. 



"Zonrium cruslaeeous, growing on a basal lamina. Zooccia not projecting, 

 arranged in single or multi])le series, forming raised ridges radiating more or less 

 regularly from a central ])art, opening along the summits of the ridges or towards 

 their extremities, intervening grooves occupied by a punctate calcareous membi-ane." 

 —(McG.). 



L. bicolor, McG. PI. XX., fig. 8. 



Biastopom bicolor, McG., T.Il.S.V., 1884., p. 117. 



" Zoarinm nearly circular, consisting of three parts ; a central elevated portion 

 composed of perfect cells, surrounded by a broad fringe of imperfcctly-develoj^ed 

 cells, beyond which is a thin lamina." . . " The central portion is much raised, 

 Hat, and d(\pressed at the centre. The cells are arranged in irregular radiating 

 series ; the seri(>s arc distinct, but Avithout intervening spaces. The cells are 

 slightly rugose, and thickly punctate. The mouth is oval or elliptical, with slightly 

 thickened margin ; those of the marginal cells are ojien, most of the inner being 

 filled in by a j^lafe punctate or perforated like the rest of the cell. In the central 

 part are numerous rounded eminences, mostly at the commencement of the series 

 of cells, and of the same width ; they are punctate or perforated in the .same manner, 

 but present no trace of month. The surrounding fringe consists of a broad layer of 

 imperfectly-developed cells; the thin lamina beyond this is marked with .slight 

 radiating grooves, as occurs in the corresponding part of other species of Diastopora 

 and Discoporella." — (McG.) . 



M.C. Living. Victoria. 



The above description is taken froni a recent .specimen, but with the exception 

 of the projecting basal lamina, which has disappeared, might have been written of 

 the single specimen from Muddy Creek. 



2. L. fasciculata, McG. PI. XXII., figs. 4, 7. 

 Diastopora fascicula/a, McG., T.K.S.A'., 1881., p. 97. 



