Tertiary Polyzoa of Victoria. 71 



Gemellipor'a auriculata, n. sp (PI. VIII., Fig. 15). 



Zooecia oval, ventricose. Thyrostome longer than broad, with 

 a deep, pointed triangular sinus on the proximal margin. A 

 comparatively large ear-shaped raised avicularium on one side of 

 the zooecia. 



Z^i^rt:///')'.^ Mitchell River (J. Dennant). 



This is near G. elegantissima, McG., but the avicularia are 

 much larger, and the surface of the zooecia is smooth, not 

 perforated. The avicularia are sometimes absent, and on one 

 (broken) zooecium on another specimen there are two avicularia 

 (Fig. 15«). 



Aspidostoma airensis, n. sp. (PI. VIII., Fig. 16, 16^). 



Zoarium robust, in vincularia form. Zooecia very large, 

 elongate, produced beyond the thyrostome as a more or less 

 acute, concave process ; a small acute avicularium on one side of 

 the zooecia. Thyrostome arched above ; proximal margin with 

 a very broad projecting lip, leaving a narrow opening or sinus at 

 each lower angle. Ooecia globose, with a large flat area in front 

 surrounded by a narrow ridge. 



Locality. — Aire Coastal Beds (T. S. Hall). 



This is a very large celled species, the acute distal prolongation 

 of the zooecia is very characteristic. On the zooecium which 

 bears an ooecium the concave prolongation is represented by a 

 long round rough spine on the side of the thyrostome. The 

 surface of the proximal margin of the zooecia is slightly turned 

 up in very regular small square crenulations — an ornamentation 

 of a character I have not before seen in polyzoa. I have some 

 fragments from Cape Otway in which the zoarium has zooecia on 

 one side only, and they are not produced distally into a point, 

 although they protrude somewhat ; they are probably imperfect 

 specimens of this species. 



Cellaria incudifera, n. sp. (Pi. IX., Fig. 17, 17^;). 



Zoarium large, cylindrical. The zooecia vary in shape. In 

 the ordinary zoarial form some are battledore-shape, some 

 diamond-shape ; but in the stouter zoaria they are elongated 

 hexagonal with distal and proximal margins horizontal ; all have 



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