166 Proceedings of the Royal Society of Victoria. 



Locality. — Muddy Creek. (J. Dennant). 



This is a most interesting specimen, as I am not aware that an 

 avicularian mandible has ever been found preserved in fossils ; 

 the locality, some sixty miles from the sea, precludes the idea of 

 its being a recent specimen, and besides it is not a recent species. 



Cellaria ovicellosa, Stoliczka. (PI. XVIIL, Fig. 12). 



I give a figure of this species as Stoliczka does not notice the 

 margins of the zocecia, he only shows the raised area with smooth 

 interspaces and speaks of the zocecia as '■'■ celhilis magnis distatiii- 

 btis ;'''' his specimen was probably much worn, as the "natural 

 size " figure shows it to have been a very small fragment. The 

 margins are linear ridges but slightly elevated above the sui'face, 

 and show the zoojcia to be diamond shaped, or rather oval with 

 pointed distal and proximal extremities. 



The species which Mr. Waters identified with this has been 

 renamed by Dr. MacGillivray C. laticella, and the figures given 

 by both all show the raised portion of the zocecia as more or less 

 pointed below, whereas in Stoliczka's figure of C. ovicellosa the 

 proximal end has the same curve as the upper or distal part and 

 it is consequently not oval, but elliptical as in the specimen I 

 have figured. 



Cellaria enopmis, n. sp. (PI. XYIII., Fig. 13). 



Zoarium very robust, clavate. Zocecia very large, hexagonal 

 with upper and lower ends truncated horizontally ; margins 

 raised ; thyrostome arched above, straight below with two 

 denticles on lower margin ; avicularian cells larger and broader 

 than the others, with the upper half of the margin curved ; 

 avicularian opening large, arched above, slightly concave below 

 and a raised margin I'ound it. 



Locality. — Balcombe Bay, Mornington. (T. S. Hall). 



This species is remarkable for the large size of the zoarium and 

 zocecia and for the very large avicularia. 



Cellaria crassimarginata, n. sp. (PI. XVIII, Fig. 14). 



Zoarium robust, oval in section, upper portion raised into two 



proniiiipncps from eacli of which an intornodo arises. Zo(>?cia 



