A MONOGRAPH OF THE TERTIAKY POLYZOA. OP VICTORIA. 83 



Var. armala. Zooecia someAvliat quadrate ; a rounded avicularium near an 

 angle of the zooecium above. 



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



9. aS'. strictifissa, n.sp. PL XL, fig. 12. 



Zooicia distinct, irregularly arranged, roiuided, convex; tliyrostome semi- .^\">*'' ' ■*^'; 

 circular, witli a deep, narroAV, wcdge-sliaped sinus in the hnver liji ; a small^ ^^ '"''' ,.< 

 avicularium (frequently absent) on one or both sides ojiposite the lower part of ^^-L'-J^^NTOl, -^ 

 the thyrostome. 



B. 



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



Zoarium encrusting. Zowcia 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 zoa'cium. 



S.P. 



11. S. pvofanda, n.sp. PI. XL, fig. 14. 



.'' Schizoporella feiiestrata, Waters, Q..T.G.S., 1881, p. 339. 



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

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

 also the base of tlie zowcium above, the lower lip Avitli a small rounded sinus, the 

 peristome thin and produced ; about five spines above the peristome ; a transvei'se 

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

 the elevated portion of the zooscium. 



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 

 zoo3cium to the lower lip, and rising more gradually where it involves the base of the 

 zoo3cium above. On the elevated portion of the zocecium, 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 outAvards beyond the edge of the zoarium, the mandible being long and 

 more triangular. The surface of the zoo3cia is smooth and glistening, with usually 

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



M2 



