86 A JIONOGllAPII OF THE TERTIAUY POLYZOA 01" VICTORIA. 



somicircular, the struiglit lower eilye with a small round sinus; lour sjiines on tlm 

 upper edge. 



M.C. 



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



Zocecia large, ncjarly hexagonal but rounded above, separated by narrow raised 

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

 thyrostome large, wide, arched above Avitli rounded angles below, low^er lip straight 

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

 of the zoojcia an avieuhirium w'ith long mandible directed upwards and inwards, on 

 one side of the thyrostome close to the margin. 



M.C. 



20. S. homhycina, Waters. PI. XI., fig. 23. 



Schisoporella homhycina, Waters, Q.J.G.S., 1882, p. 274. 



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

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

 below ; a rounded eh^vation, Avith a small avicularium Avith 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. XI., fig. 21. 



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



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

 surface Avith numerous pores ; thyrostome Avith a wide shalloAV sinus in loAA'er lij) ; 

 a hoUoAV, pointed, elevated process from immediately beloAV the lower lij) arching 

 over the loAVf r part of the thyrostome and Avith an avicularium to one side. Ooecia 

 lai'ge, gloljular, obscurely porous. 



B. Living. Australia. 



22. S. alula, n.sp. PI. XL, fig. 25. 



Zoarium enerusliiig. Zoa^eia A'ery broad, Avidely expancU-d aljove Avith a sharp 

 angle sujjcriorly on each side, se})arated by narrow raised lines ; surface nearly flat, 

 closely and linely granular ; thyrostome semicircular, straight beloAV, Avith a 

 rounded sinus, the whole peristome slightly thickened. 



M.C. 



