Tertiary Folyzoa of Victoria. 207 



Micropora carinata, n. sp. (PI. XXXIV., Fig. 6). 



Zoarium cylindrical. Zooecia elongated, hexagonal with a 

 central longitudinal ridge or keel ; surface either granulated or 

 with scattered pores ; distal end protrudes. Thyrostome raised, 

 semicircular, with thickened margin. 



Locality. — Mitchell River (J. Dennant). This is very plentiful 

 in the deposit. 



Membraniporella decorata, n. sp. (PI. XXXIV., Fig. 7). 



Zooecia elongate, irregular in form, with oval raised area 

 bearing 10 ribs on each side, which are thickened so as to show a 

 circular convex elevation, and a very small round cavity on the 

 inner portion of each rib. Thyrostome suborbicular, with a slight 

 projection on each side. Ooecium elliptical, globose, adnate, 

 situated obliquely on one side of upper part of the zooecium ; 

 ooecial aperture broad, arched above, straight below. 



Locality. — Mornington (T. S. Hall). 



The single small specimen figured is the only one I have found. 

 The structure of the ribs, and the obliquity of the ooecium show 

 it to be quite distinct from any other species. 



Membraniporella pugosa, n. sp. (PI. XXXIV., Fig. 8). 



Zooecia oval, margins undefined ; fx'ont surface with 9-11 thick 

 rugose ribs. Thyrostome suborbicular, with thick raised margins, 

 slightly incurved towards the lower part ; operculum calcareous 

 and apparently hinged to the incurved part of the margin of the 

 thyrostome. Ooecia elongated, oval Avith a longitudinal very 

 slightly raised median rib, and a few small scattered perforations; 

 ooecial aperture arched above with similar, but much more 

 prominent, incurvations to those of the zooecia. 



Locality. — Mitchell River (J. Dennant). 



The distinguishing features of this species are the large rugose 

 ribs, the calcareous opercula apparently hinged at the sides and 

 the elongated oval ooecia. 



Copbulipora ampulla, n. sp. (PI. XXXIV., Fig. 9). 

 Zooecia oval, front much raised, with large margined pores 



