36 A MONOGRAPH OP THE TERTIARY POLYZOA OP VICTORIA. 



Differs from the next species in the narrowness of the zooecia and the different 

 form of the area. 



6. M. cyclostoma, n.sp. PL IV., fig. 13. PL XXIL, fig. 12. 



Zoarium probably bilaminate. Zooecia largo, somewhat quadrate, but bulging 

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

 area subcircular, occupying nearly the whole of the front, but in some 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 from an imperfect specimen and does not properly shew 

 the structure, which is much better seen in the figure in PL XXIL 



7. M. profunda, n.sp. PL IV., fig. 14. PL VIII., fig. 2. 



Zoarium encrusting or bilaminate. Zocecia large and broad, slightly angular, 

 separated by narrow raised lines, from which the thick granular margins slope 

 abruptly downwards and inwards; avicularia situated at the junction of three 

 zooecia, rounded above and straight below. 



8.P.; M.C. 



8. M. macrostoma, Eeuss. PL IV., figs. 15, 16. 



Gellaria macrostoma, Reuss. Poss. Poly p. d. Wiener tert., p. 64 ; Membrcmipora 

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

 Peb. 1881 ; Bijlustra coronata, Mc(L, T.R.S.V., Nov. 1890. 



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

 flattened and bilaminate, occasionally crustaceous. Zooecia alternate in longitudinal 

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

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

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

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



S.P. ; M.C. ; B. ; M. ; C.P3. Living. Philippines and Australia, 

 I am not quite satisfied that this is the species described by Reuss. It is, 

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

 identical with the M. coronata described by Hincks from the Philippines and by 

 myself from Australia. 



9. M. sculpta, n.sp. PL V., fig. 1. 



Zoarium encrusting. Zooecia distinct, very irregularly arranged, usually 

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



