Tertiary Polyzoa of Victoria. 7 



Locality. — Cape Otway (Hall and Pritchard). 



The great peculiarity of this species is the form of the avicu- 

 laria, which is globulai\ I took them at first to be ooecia, but 

 an examination of a specimen with some zooecia with only one 

 avicularium at the side of the peristome showed their true 

 character, and that the mandible opened into the inside of the 

 peristome. In those zooecia which have an avicularium on each 

 side of the peristome, the mandibular area is not visible. The 

 small tubular projections are probably the bases on which spines 

 were articulated. 



Palmlcellapia uniserialis, n. sp. (PI. II., Fig. 16). 



Zoarium free, phytoid. Zooecia in single series, elongated, 

 almost tubular, with a rib on each side and one on the middle of 

 the dorsal surface ; peristome slightly everted ; a row of pores on 

 the inner edge ; ooecia small, subglobose. A few perforations 

 round the base. 



Locality. — Mitchell River (J. Dennant). 



This I place provisionally in Palmicellaria, though it differs 

 from that genus in being uniserial, but, as zooecial characteristics 

 are more I'elied upon for generic classification than zoarial, I 

 have probably placed it correctly. It is allied to the preceding 

 species as the zooecia are of similar shape. . I have seen no 

 avicularia. The specimen figured is the only one that shows an 

 ooecium ; I have one or two consisting of two zooecia, but the 

 majority of the specimens are single zooecia. 



Characodoma, nov. gen. 

 Zoarium in elongated quadrate internodes. Zooecia uniserial 

 on each face of the zoarium. Tliyrostome ovate with a sharp 

 denticle on each side pointing downwards over the lower or distal, 

 triangular portion. 



Chapacodoma halli, n. sp. (PI. II., Fig. 17). 

 Characters as for genus, but the fertile and infertile zooecia 

 differ considerably. The infertile are suborbicular in shape, 

 convex, covered with mamillae of various sizes ; an avicularium, 

 on a more or less prominent elevation, with a triangular mandible 

 on each side (occasionally on one side only) of the thyrostome, 

 which is ovate with a sharp denticle on each side pointing down- 

 wards ; the lower or proximal portion being subtriangular. 



