'Tertiary Polyzoa of Victoria. 27t3 



In neither of these families could they be included. I am aware 

 that It is not considered advisable to institute a new family, or 

 even a new genus, upon purely zoarial charaoters, especially as, 

 at the present time, the structure of the operculum, and whether 

 the rosette plates have a single pore, or many, are considered 

 by some to be of equal, if not greater, taxonomic value than the 

 more evident zooecial characteristics, and that zoarial form is 

 almost entirely ignored ; but the species here described, six in 

 number, are so very distinctive in their zoarial character that 

 I consider the creation of a new family for their reception is 

 quite justified. 



8ynaptacella, nov. gen. 



Character as for family. 



Zooecia ovoid, pyriform or cuneate. Aperture large, oval ; 

 margins raised. 



The zooecial characteristics of the species of this genus vary 

 somewhat, but they all resemble one another to such an extent 

 that, taking into consideration their uniform zoarial character, 

 I consider they may properly be placed in the one genus. 



Synaptaceila asymmetrica, n. sp. (PI. XL., Fig. li)). 



Zoarium free. Zooecia in single series. Zooecia ovoid and 

 cuneiforn); aperture oval or suborbicular, small and asymmetri- 

 cal ; margins thick and raised ; a large round depressed area in 

 the proximal part of the l)asal wall, and a small one in the 

 distal end ; an avicularium at the distal part, of the zooecia on 

 the side towards which the aperture is directed. 



Locality.— Spring Creek (Dr. Hall). 



The specimen consists of two zooecia only, the proximal one 

 not quite perfect, and the distal one has a rounded ridge on one 

 side. Tlie comparatively small asymmetrical aperture with the 

 very thick raised margin and the small lateral avicularia are 

 distinctive. 



Synaptaceila gibbosa, n. sp. PI. XL., Fig. 20). 



Zoarium free. Zooecia in single series. Zooecia irregularly cunei- 

 form, asymmetrical ; aperture elongated, subtriangular, rounded 



4 



