Tertiary Folyzoa of Victoria. 189 



Amphiblestpum sexspinosum, n. sp. (PI. XXIV., Fig. 14). 



Zoarium cylindrical. Zooecia quiiicuiicial, four in lateral 

 series, pyriform, surface finely granulated ; opesia large, oval, 

 occupying half the length of the zooecia, margin raised, with 

 three large, blunt spines on each side ; proximal area narrow, 

 with slightly elevated margin. Avicularia situated close to 

 proximal margin of opesia, edges raised, proximal more than 

 distal, with transverse subspatulate mandible opening upwards. 

 Ooecium galeate, raised, granular. 



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



This is very numerous in the deposit, but on only one specimen 

 (Fig. 14a) was there an ooecium, and the form of the avicularia 

 are better seen in it than in the other specimen figured. 



Amphiblestpum ovatum, n. sp. (PI. XXIV., Fig. 15). 



Zoarium cylindrical. Zooecia quincuncial, six in lateral series, 

 spatulate in shape, surface smooth; ai'ea elliptical, with highly 

 raised margins ; opesia oval. 



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



This species is remarkable for the very regular elliptical area 

 and smooth porcellaneous surface. 



Amphiblestpum monilifepum, n. sp. (PL XXIV., Fig. 16). 



Zoarium encrusting. Zooecia elongated, oval; surface granular; 

 opesia occupying three-fourths of area, oval, with I'ather rugose 

 raised margins bearing about fifteen blunt sjiines which are 

 connected with each other by a narrow raised ridge that expands 

 and surrounds the base of each spine. Avicularia vicarious, 

 nearly as large as a zooecium, with long, acute, slightly curved 

 mandible. 



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



The large vicarious avicularia and the connecting ridge between 

 the spines are very distinctive. 



Amphiblestpum nitidum, n. sp. (PI. XXIV., Fig. 17). 



Zoarium cylindrical. Zooecia oval, quincuncially arranged, 

 six or eight in lateral series : opesia oval or subtriangular, with 



