Tertiary Polyzoa of Victoria. 143 



Locality. — Orphanage Hill, Geelong (T. S. Hall), and Cauip- 

 bell's Point (J. F. Mulder). 



The zooecia in the centre are generally imperfect, througli 

 erosion. This is near C. fossa, but differs from it in the zooecia 

 not being so ventricose, and in having a flattened area in front. 



The marginal zooecia project so as to give a stellate appearance 

 to the zoaria. 



Solenopopa, nov. gen. 



Zooecia ovoid. Thyrostome oval, within which is a tubular 

 process with a circular poi'e on the summit. Ooecium large, 

 globular, subiramersed. 



This genus is very near Cellepora, but the tubular process is 

 inside the thyi^ostome, a unique condition ; some of the Celle- 

 poridae have one on the outside. 



Solenopopa tubulifera, n. sp. (PL Fig. 7). 



Zoarium encrusting. Zooecia ovoid or pear-shaped, subim- 

 niersed, surface smooth. Thyrostome oval, with peristome pro- 

 duced distally supporting inside a tubular process (probably 

 avicularian) with a circular pore at the summit : two raised 

 tubular processes below the thyrostome and a few scattered pores 

 near the base of the zooecia : spatulate avicularia scattered 

 among the zooecia. Ooecia very large, globular, subimniersed 

 with an irregularly elliptical aperture and a small raised disk 

 below with an oval pore it it. 



Locality. — Wilkinson's, No. 4 (Hall and Pritchard). 



Retepora uniserialis, n. sp. (PI. XVI., Fig. 8). 



Zoarium dendroid (?). Zooecia in single series, oval, with 

 narrow raised margins ; surface smooth. Thyrostome arched 

 distally, proximal margin straight, with deep narrow sinus in the 

 centre ; a spine on each side about the middle. An enormous, 

 raised aviculariuni below, covering almost the whole surface of 

 the zooecium ; with sometimes two pores near the proximal end. 

 Above the thyrostome is an oval smooth depression which is 

 probably the base of an ooecium. 



