A MONOGRAPH OP THE TERTIARY POLTZOA OP VICTORIA. 143 



6. L. reticulata, McG. PI. XXI., fig. 7. 



Discoporella reticulata, McG., T.R.S.V., XX., 1883, p. 126. 



" Zoariuni orbicular, bordered, convex ; cells connate, radiating in nniserial 

 rows of irregular lengths ; peristome with the outer border produced, pointed, and 

 entire ; centre of zoariuni occupied by large shallow cancelli, separated by narrow 

 raised walls ; a single or double row of smaller rounded cancelli between the rows 

 of cells. . . . The most distinctive character is the number and large size of 

 the shallow cancelli in the centre of the zoarium. There are no spines to be seen 

 in the interior of any of the cells or cancelli." — (McG.). 



The fossil shows blunt spines in the zooecial tubes and cancelli as shown in the 

 figure, and the walls of the large cancelli are pierced by rounded pores. 



7. L. australis, McG. PI. XXL, fig. 6. 



Zoarium a short blunt cone, depressed at the apex ; base flat. Zocecia 

 arranged in regular radiating lines usually in a single series, walls confluent, 

 apertures rounded, produced on the side nearest the centre into one or more blunt 

 teeth ; occasionally crossed by thin tabulae at or near the orifice ; walls granular 

 with one or more longitudinal flutings on the side facing the centre. Cancelli 

 rounded; two or three irregular rows between the radial ridges. Ooecium formed 

 by an inflated, thin, punctate, calcareous plate in the centre of the colony and 

 sending prolongations between the rays. A single row of cancelli between each 

 prolongation and the zooecial row on each side of it. 



M.C. 



8. L. cribraria, McG. PI. XXL, fig. 12. 



Zoariuni discoid, depressed, apex concave. Zooecia in radiating curved rows, 

 sometimes bifurcating near the margin. Surface between the rows covered with a 

 thin uneven calcareous plate extending to the margin and pierced by numerous 

 small circular pores ; a similar plate closing the cancelli slightly below their 

 apertures ; cancelli visible only near the centre of the colony. 



M.C. 



Heteropora, Blainv. 



" Zoarium encrusting in a thick layer, or forming thick erect cylindrical 

 branches. Zocecia long, tubular, quite immersed, opening by rounded or angular 

 orifices on the surface. Between the apertures of the zocecia the orifices of numerous 

 other small pores or cancelli." — (McG. ms.). 



