86 A MONOGRAPH OP THE TERTIARY POLYZOA OF VICTORIA. 



semicircular, the straight lower edge with a small round sinus ; four spines on the 

 upper edge. 



M.C. 



19. S. nitens, n.sp. PI. XI., fig. 22. 



Zooecia large, nearly hexagonal but rounded above, separated by narrow raised 

 margins, within which are some minute areolations, convex, smooth and shining ; 

 thyrostome large, wide, arched above with rounded angles below, lower lip straight 

 with a large round sinus ; several spines (very obscurely indicated) above ; on some 

 of the zooecia an aviculariuni with long mandible directed upwards and inwards, on 

 one side of the thyrostome close to the margin. 



M.C. 



20. S. boinbycina, Waters. PL XI., fig. 23. 



Schizoporella bombycina, Waters, Q.J.G.S., 1882, p. 274. 



Zoarium encrusting or bilaminate. Zooecia distinct, convex, smooth, frequently 

 with small areolations at the margins ; thyrostome semicircular, with a wide sinus 

 below ; a rounded elevation, with a small avicularium with triangular mandible, to 

 one side and slightly below the thyrostome. 



B. 



None of my specimens have ooecia. They are described and figured by Waters 

 as very small. 



21. S. rostrata, McG. PI. XL, fig. 24. 



Schizoporella rostrata, McG., P.Z.V., 186. 



Zoarium encrusting. Zocecia ovate, separated by very narrow, raised lines ; 

 surface with numerous joores ; thyrostome with a wide shallow sinus in lower lip ; 

 a hollow, pointed, elevated process from immediately below the lower lip arching 

 over the lower part of the thyrostome and with an avicularium to one side. Ooecia 

 large, globular, obscurely porous. 



B. Living. Australia. 



22. S. alata, n.sp. PL XL, fig. 25. 



Zoarium encrusting. Zooecia very broad, widely expanded above with a sharp 

 angle superiorly on each side, separated by narrow raised lines ; surface nearly flat, 

 closely and finely "granular ; thyrostome semicircular, straight beloAV, Avith a 

 rounded sinus, the whole peristome slightly thickened. 



M.C. 



