184 Proceedings of the Royal Society of Victoria. 



the zooecia, pointed at the distal end and slightly encroaching 

 on the zooecium above ; the two upper margins incurved, 

 mandible pointing upwards. 



Locality.— Qov'w Bay (T. S. Hall). 



The zooecia are very like those of the typical C. conligua, but 

 the avicularia are different ; they are more like those of 

 C. de/ifianti; they are as large as, and take the place of, a 

 zooecium ; they are upright, or parallel to the axis of the 

 zoarium, whereas those of the type are only about half the 

 length of a zooecium and are always slanting either to the right 

 or left, being placed between the sloping sides of the zooecia. 

 Fig. 2 shows the avicularia somewhat in side view ; this portion 

 of the zoarium was chosen for illustration as there were three 

 zooecia it it which had the thyrostomes perfect ; in most of them 

 the thyrostome is either imperfect or obscured by the matrix. 

 Fig. 2a shows the front view of another avicularium. 



This may be a new species but I prefer at present to treat it 

 as a variety of C. co/itigua. 



Melicerita elliptica, n. sp. (PI. XXIII., Fig. 3). 



Zoarium compressed, ligulate, zooecia on both faces. Zooecia 

 elongated, hexagonal, with upper and lower margins transverse ; 

 occasionally they are pointed distally and are then five-sided ; 

 Surface granulated, margins raised. Thyrostome elliptical. 

 Avicularia cucullate, situated on the proximal part of the 

 zooecia. 



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



I have several specimens, but the one from which the figure 

 is taken is the only one which shows avicularia ; they are 

 situated in an uncommon position, being on the surface of the 

 zooecium and not vicarious. As the thyrostome differs from 

 those of the Cellariae in being elliptical and having no internal 

 denticles and as it is similar to that of Melicerita diibia, Busk 

 (C.P. XXX., p. 97, pi. xxxiii., fig. 10), I provisionally place it in 

 the same genus. 



Cellaria gigantea, n. sp. (PI. XXIIL, Fig. 4). 

 Zoarium large, cylindrical. Zooecia very large, irregularly 

 hexagonal, margins raised ; distal margin arched, lateral margins 



