Tertiary Polyzoa of Victoria. 205 



arched above, slightly incurved below • margins raised ; opercula 

 calcareous. Ooecia large, oval, ribbed, with a central keel, 

 sessile on zooecia. 



Locality. — -Mitchell River (J. Dennant). 



A single specimen. The ooecium is of large size and is unfor- 

 tunately imperfect, the front being broken away, but it was 

 evidently cribriform with a central rib. The specimen is note- 

 worthy, because in three of the zooecia the opercula are preserved 

 and they are calcareous. 



Cribpilina tupgida, n. sp. (PL XXXIY., Fig. 3). 



Zoarium encrusting. Zooecia oval, margins undefined ; front 

 wall thick and porcellaneous, with large pores irregularly disposed 

 over the surface, the marginal pores incomplete showing as a 

 series of small arches. Thyrostome opening upwards, lower 

 margin thick, projecting and curved, upper margin invisible, 

 apparently continuous with the dorsal wall. Ooecia galeate, 

 smooth. 



Locality. — Aire Coastal Beds (IVIessrs. Hall and Pritchard). 



I have found two specimens of this species, one with ooecia 

 (part of which is figured), the other without. This species is near 

 C. labiosa, Busk, variety, a fragilis (C.P. xxx., p. 133, pi. xix., 

 fig. i), but there is no projecting spout in the front of the thyros- 

 tome, and the margin of the front wall is different, the shape of 

 the zooecia being undefined and not distinctly "barrel-shaped" 

 as described and figured by Busk. 



Micpopopa elegans, n. sp. (PI. XXXIV., Fig. 4). 



Zoarium encrusting.. Zooecia generally ovate, but often 

 irregularly quadrate ; margins very much raised and prominent ; 

 surface depressed but slightly convex, with small scattered pores ; 

 occasionally a very small opesiule in the upper angles of the 

 zooecia. Thyrostome semicircular, margin raised. Ooecia 

 globose, finely granular; a narrow smooth depression, interrupted 

 in the middle, just above the aperture. Small avicularia above 

 the thyrostome of infertile zooecia. 



Locality. — Aire Coastal Beds (Messrs. Hall and Pritchard). 



I have several specimens, all growing on Afembranipora lij^'u- 

 lata. It is near M. coriacea but differs from it. There are no 



