36 A MONOGKAl'lI OF TUE TERTIAllY POLYZOA OF VICTOKIA. 



Uillcis Iroiu tlu" uext species in llie narrowness uf the zooecia aud the dill'ereiit 

 form of the area. 



6. 31. ci/closioma, n.sp. PL IV., fig. 13. PL XXII., fig. 12. 



Zoariiim probably bihunmate. Zocjecia kirgo, somewhat quadrate, but bulgmg 

 at the sides, continuous and indistinct longitudinally, separating readily laterally ; 

 area subcircular, occupying nearly the whole oi" the front, but in sonic cases a slight 

 extension of the cell below ; margins slightly thickened, smooth and with a very 

 narrow distinct rim within. 



S.P. ; M.C. 



Pig. 13, in PL IV., is IVoni an imperfect specimen and does not properly sliew 

 the structure, which is much better seen in the figure iu PL XXII. 



7. M. profunda, n.sp. PL IV., fig. li. PL VIII., fig. 2. 



Zoarium encrusting or bilaminate. Zocccia largo and broad, slightly angular, 

 se]iarated by narrow raised lines, from -whieh the thick granular margins slope 

 abru])tly downwards and inwards; avicularia situated at the junction of three 

 zoa'cia, rounded above and straight below. 



S.P.; M.C. 



8. 31. tiHicfunloma, lleuss. PI. IV., figs. 15, 10. 



(Jellana niacroslonKi, Peuss. Poss. Poly p. d. Wiener tert., p. Oi; 31einbj'aitipora 

 mucrostoma, Waters, Q.J.G.S., Aug. 1881, p. 323; 31. coronata, Hincks, A.M.N.H., 

 Feb. 1881 ; Bljlustra coronata, McG., T.Il.S.V., Nov. 1890. 



Zoarium erect, branched dichotomously, branches subcylindrical or (usually) 

 flattened and bilaminate, occasionally crustaceous. Zoa'cia alternate in longitudinal 

 series, elongated, oblong, separated by distinct narrow raised margins, a granular 

 lamina sloping inwards ; aperturce lliptical or ovate, occupying about three-fourths 

 of th(! area, margin thickened; a small sessile avicularium (occasionally absent) , 

 placed transversely or obliquely, at the summit of each zocfcium. 



S.P. ; M.C. ; B. ; M. ; C.B. Living. Philippines and Australia. 



I am not ([uite satisfied that this is the species described by iieuss. It is, 

 however, undoubtedly that so named by Waters, and I am also satisfied that it is 

 identical Avith the 31. coronata described by Hincks from the Philipi)ines and by 

 myself from Australia. 



9. 31. actdpta, n.sp. PI. \'., fig. 1. 



Zoarium encrusting. Zocecia distinct, very irregularly arranged, usually 

 elongated, elliptical or rounded, or occasionally angular ; margins, sharp, thick, 



