130 A MONOGRAPH OF THE TERTIARY POLTZOA OF VICTORIA. 



Stomatopora, Bronn. 



Zoarium adnate, simple or irregularly branched ; branches linear or ligulate. 

 Zooecia in simple series or in more or less regular transverse rows. 



1. S. mceandrina, n.sp. PL XX., fig. 2. 



Of this I have only a single specimen growing over a Ketepore. It forms a 

 long curved zoarium, convex. At the growing extremity the zooecia are separated 

 by narrow grooves or depressions ; at the fully-formed parts they are very indis- 

 tinctly arranged, confused or separated only by very faint raised lines. The surface 

 is smooth or densely minutely granular. The thyrostomes are circular, the peristome 

 thickened and turned abruptly forwards and produced. The inner surface is spinous 

 but without distinct denticles or processes. In the growing part there is a very 

 narrow thin basis jirojecting beyond the edge. 



B. 



2. S. geminata, McG. PL XX., fig. 1. 



S. geminata, McG., P.Z.V., pi. 176; id,, T.K.S.V., XXIII., 1886, p. 36. 



Zoarium branched ; branches narrow, consisting of series of pairs of zooecia. 

 Zooecia very long, narrow, closely united throughout their whole length ; surface 

 minutely granular; thy ros tome projecting and turned forwards, circular. 



M.C. Living. Victoria. 



Diastopora, Johnston. 



Zoarium adnate, discoid or flabelliform or lobed, or wholly or partly raised and 

 bilaminate. Zooecia tubular, with an elliptical or subcircular thyrostome, crowded 

 and immersed towards the centre, more distinct and partially free towards the 



margins. 



1. D. discoidea, n.sp. PL XX., fig. 3. 

 (For description see Appendix.) 



2. D. patina, Lamk. PL XX., figs. 4, 5. 



Diastopora patina, Hincks, B.M.P., 458; Busk, B.M.C., III., 28; McG., C.V., 

 32, ; id,, P.Z.V., XV. 



Zoarium thin, crustaceous. Zooecia decumbent and adherent except at the 

 extremities, which are free and slightly turned forwards ; thyrostomes elliptical, 



