Tertiary Polyzoa of Victo7'ia. 167 



elongated, diamond shaped with slightly truncated distal and 

 proximal extremities ; margins raised ; thyrostome subtriangular 

 with a thickened peristome, lower lip incurved. 



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



This is a very peculiar species as the upper portion of the 

 zoarium diverges into two elevations to each of which an inter- 

 node is apparently attached and the peristome is thickened and 

 raised above the surface of the zoa'cia. The two upper apertures 

 may be avicularia, as they are not of the same shape as the 

 thyrostome. 



Cellaria depressa, n. sp. (PI. XVIIL, Fig. 15). 



Zoarium vei'y robust. Zocecia diamond shaped (very slightly 

 truncated horizontally) with linear raised maigins, within which 

 the surface of the zooecia is raised as a broad slightly convex 

 ridge round the sides ; middle of the zocecia depressed ; whole 

 surface granulated; thyrostome near the distal end, arched 

 above, straight below, with two denticles in lower lip. 



Z^a?//0'.— Shelford. (T. S. Hall). 



In the size of the zoarium and zocecia this is very similar to 

 C. crassimarginata, but otherwise quite distinct. 



Cellaria tumida, n. sp. (PL XVIIL, Fig. 16). 



Zoarium long and slender. Zo?cia irregularly hexagonal, 

 very tumid ; margins invisible, deeply sunk ; thyrostome in 

 the centi'e of the zoo?cia, more or less crescentic, much 

 depressed. 



Locality. — Mitchell River. (J. Dennant). 



This is a very peculiar species, the tumid or swollen appear- 

 ance of the zooecia being quite unlike any other ; the portion of 

 the internode found is very long in proportion to its diameter. 



Bicellapia elongata, n. sp. (PI. XVIII, Fig. 17). 



Zocecia elongate, turbinate, much produced below ; aperture 

 ovoid, occupying about a third of the area ; two spines at outer 

 angles. Dorsal surface smooth, ventricose above ; zocecia divided 

 by a narrow longitudinal ridge. 



Locality. — Mornington. (T. S. Hall). 



