82 A MONOGRAPH OP THE TERTIARY POLTZOA OP VICTORIA. 



5. S. rugosa, n.sp. PI. XI., fig. 6. 



Zoarium small, cylindrical. Zocecia alternate in longitudinal series, indistinct ; 

 surface irregular, with pores and sharp ridges, one of which crosses obliquely about 

 the middle ; a round pore (probably avicularian) immediately above the transverse 

 ridge ; thyrostome arched above, straight below, with a small sinus. 



S.P., a single specimen. 



6. S. australis, Tenison Woods. PI. XI., fig. 7. 



Tetrapleura australis, Tenison Woods, T.R.S.N.S.W., 1878, p. 5 ; Sclrizoporella 

 australis, Waters, Q.J.G.S., 1881, p. 341. 



Zoarium filiform, with the zooecia arranged alternately in four series facing 

 different ways. Zooecia very much elongated, separated by distinct raised lines, 

 narrowed below, the upper part slightly projecting; surface finely and regularly 

 closely granular ; thyrostome at the extreme upper end, semicircular, contracted 

 and straight below, with a small slightly rounded sinus ; on each side of the 

 thyrostome a small articulated spine. 



S.P. ; C.C. and B.R. (W.) 



7. S. submersa, Waters. PL XI., figs. 8, 9. 



Schizoporella submersa, Waters, Q.J.G.S., 1881, p. 340. 



Zoarium bilaminate, usually erect in narrow lobes, occasionally broader. 

 Zooecia alternate, long, broad above, contracted and narrow below ; surface irregu- 

 larly granular or smooth, pitted and with a submarginal row of pits or areola? ; 

 thyrostome lofty, higher than wide, arched above, nearly straight below, with a deep 

 narrow sinus ; usually an avicularium on one or both sides near the middle of the 

 zooecium, with the slender mandible directed inwards, sometimes absent, and a 

 smaller avicularium by the side of the thyrostome. 



S.P. ; M.C. ; B. ; B.B, ; C.C. (W.). 



8. S. schizostoma, McG. PL XL, figs. 10, 11. 



Lepralia schizostoma, McG., P.Z.V., 38; Schizoporella schizostoma, Waters, 

 Q.J.G.S., 1883, p. 439. 



Zoarium encrusting. Zooecia ovate, separated by narrow raised lines or 

 indistinct, convex ; surface granular or nearly smooth, with usually a slight 

 eminence a short distance below the thyrostome; thyrostome semicircular, the 

 lower lip straight with a narrow slit-like sinus. Ooecia very large, globular, 

 granular. 



