A MONOGRAPH OP THE TERTIARY POLTZOA OP VICTORIA. 83 



Var. armata. Zooecia somewhat quadrate; a rounded avicularium near an 

 angle of the zooeciuni above. 



S.P. ; B. ; W.P. (W.) Living. Australia. 



9. S. strictifissa, n.sp. PI. XL, fig. 12. 



Zooecia distinct, irregularly arranged, rounded, convex; thyrostome semi- 

 circular, with a deep, narrow, wedge-shaped sinus in the lower lip ; a small 

 avicularium (frequently absent) on one or both sides opposite the lower part of 

 the thyrostome. 



B. 



10. S. crenulata, n.sp. PI. XL, fig. 13. 



Zoarium encrusting. Zooecia irregularly arranged, more or less ovate, with 

 narrow raised margins ; surface smooth or granular ; thyrostome arched above, with 

 a deep rounded sinus in the lower lip, edge of the upper lip finely crenulate or 

 denticulate; unarmed or with three or four spines above; occasionally a small 

 elliptical avicularium on the lower part of the zoceciuni. 



S.P. 



11. S. profunda, n.sp. PL XL, fig. 14. 



? Schizoporella fenestrata, Waters, Q.J.G.S., 1881, p. 339. 



Zoarium bilaminate, lobed. Zooecia regular, quincuncial, smooth, separated by 

 narrow raised lines ; thyrostome at the bottom of a deep depression which includes 

 also the base of the zooeciuni above, the lower lip with a small rounded sinus, the 

 peristome thin and produced ; about five spines above the peristome ; a transverse 

 elliptical raised avicularium below the thyrostome towards one side, on the edge of 

 the elevated portion of the zooecium. 



S.P.; M.C. ; C.B. ; M. 



This species has a very peculiar and characteristic appearance, owing to the 

 thyrostome being situated at the bottom of a deep pit sinking abruptly from the 

 zooecium to the lower lip, and rising more gradually where it involves the base of the 

 zooecium above. On the elevated portion of the zooecium, where it bends down to 

 the thyrostome, is a large elliptical avicularium placed nearly transversely. On the 

 extreme lateral zooecia these avicularia are occasionally very largely developed, 

 spreading outwards beyond the edge of the zoarium, the mandible being long and 

 more triangular. The surface of the zooecia is smooth and glistening, with usually 

 a few small pores about the margins. The avicularia are occasionally absent. 



M-2 



