82 A MONOGRAPH OF THE TERTIARY POLYZOA OF VICTORIA. 



5. S. 7'iiffosa, n.sp. PI. XI., fig. G. 



Zonriiiiii sin.ill, cylindrical. Zoa-cia alternate in longitudinal series, indistinct; 

 suri'aco irregular, with ])ores and slKirp ridges, one of wliicli crosses obliquely about 

 the middle; a round por(» (prol)ab]y avicularinn) iniiuediately above tlie transverse 

 ridge ; thyrostoiue arch(>d al)ove, sti'aight l)elow, with a small sinus. 



S.P., a single specimen. 



0. .S*. aitstralis, Tenison Woods. PI. XI., fig. 7. 



Tetrnplenra aitstralis, Tenison "Woods, T.R.S.N.S.W., 1878, p. 5 ; ScMzoporella 

 australis, Waters, Q.J.G.S., 1881, p. 311. 



Zoai'ium filiform, with the zocrcia arranged alternately in four series facing 

 different ways. Zoa^cia very much elongated, separated by distinct raised lines, 

 nari'owed below, the upjier ])art slightly projecting ; surface finely and regularly 

 closely graixular ; thyrostonu^ at the extreme upper end, semicircular, contracted 

 and straight below, with a small slightly rounded sinus; (m each side of ilie 

 thyi'ostome a small articulated spine. 



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



7. .S'. suhiuersa, Waters. PI. XI., figs. 8, 9. 



ScMzoporella suhnersa, Waters, Q.J.G.S., 1881, p. 340. 



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

 Zocecia alternate, long, broad above, contracted and narrow l)elow ; surface irregu- 

 larly granular or smooth, pitted and with a submarginal row of ])its or areolae; 

 thyrostorae lofty, higher than wide, arched alcove, nearly straight l)elo\\ , ^\ itli a deep 

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

 zocecium, Avith the slender mandible directed inwai-ds, sometinu's absent, and a 

 smaller avicularium by the side of the thyrostome. 



S.R; M.C. ; B. ; B.R. ; C.C. (W.). 



8. S. schisostoma, McG. PI. XI., figs. 10, 11. 



Lepralia schizostorna, McG., P.Z.V., 38 ; Sc/iizojwrella schizos/oma, Waters, 

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



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

 indistinct, convex; surface giaiiulai' oi- nearly smooth, with usually a slight 

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

 lower li]) straight with a nnrrow slit-like sinus. Ococia very large, i!;lobular, 

 granular. 



