Tertiary Polyzoa of Victoria. 211 



round the cell, just inside the margin. Thyrostome broadly 

 elliptical with a denticle on each side near the lower margin, 

 which is nearly straight. Ooecia globular, partly immersed, with 

 a few large round depressions on the surface ; ooecial aperture 

 semicircular with a denticle at each lower angle. 



Locality. — Lower Beds, Muddy Creek (J. Dennant). 



A single specimen. A very elegant species characterized by 

 the very regular row of round pores on the margin of the zooecia. 



Leppalia airensis, n. sp. (PI. XXXY., Fig. 18). 



Zoarium cylindrical. Zooecia oval, margins raised ; surface 

 convex, granulated. Thyrostome oval, with a denticle on each 

 side near the lower margin ; margins raised ; a small avicularium 

 in the lower margin, but entirely outside the thyrostome. 

 Ooecia globose, granulated. 



Locality. — Aire Coastal Beds (Hall and Pritchard). 



This is rather difficult to place ; it somewhat resembles a 

 Porella, but as the small avicularium is entirely outside the 

 margin of the thyi'ostome, and as it has the denticles character- 

 istic of Lepralia, I place it in that genus. 



Lepralia parti punctata, n. sp. (PI. XXXV., Fig. 19). 



Zooecia hexagonal, elongate ; margins narrow, raised ; surface 

 covered with small round pores, except on an elongated triangular 

 space below the thyrostome. Thyrostome suborbicular. 



Locality. — Mitchell River (J. Dennant). 



A single specimen. This is a very elegant species and much 

 resembles Phylactella poi-osa, McG., but the zooecia are quite flat, 

 and the th^'rostome has a denticle on each side, and is destitute 

 of a raised peristome. 



Lepralia mamillifera, n. sp. (PL XXXV., Fig. 20). 



Zooecia elongated, covered with large globular nodules. Thy- 

 rostome suboi'bicular, with raised peristome, and on each side 

 there is an avicularium, with the mandible pointing inwards, on 

 a highly raised rugose prominence. 



Z^^rt/^/j'.— Clifton Bank, Muddy Creek (T. S. Hall). 



