Zoology.2 NATURAL HISTORY OP VICTORIA. [Po/j/zoa. 



of tlie peristome, and tlius seem to be absent. Of the large 

 vicarious avicularia, also, some have the beaks smooth, while 

 others have them strongly serrated. 



Explanation op Figukes. 



Plate 166. — Fig. 1, zocBCia at growing edge. Fig. la, a portion farther back, showing oral 

 processes and a yicarious avicularium with strongly serrated beak. Figs. 16 and Ic, other 

 portions showing denticulate mouths of zooecia and ooecia. Fig. Id, two ooecia with anterior 

 rostra. Figs, le and If, vicarious avicularia with smooth rostra. 



Plate 168. — Fig. 15, chitinous parts. 



Plate 166, Fig. 2, 



CELLEPOEA FOLIATA (McG.). 



Description. — Zoarium large, base broad and loosely adnate, raised into 

 irregular, thick, erect, bilaminate lobes, anastomosing and frequently perforated at 

 the base ; edges irregular and surface verrucose or irregularly mamillated. Marginal 

 zooecia nearly horizontal, rather short; older zooecia vertical, confused, close; mouth 

 deep, straight or slightly hollowed below; operculum light coloured; pre-oral 

 rostrum, on younger zooecia, with a small, overhanging avicularium with denticulate 

 beak, produced into a moderate sized conical process. Vicarious avicularia with 

 ligulate or long triangular mandibles, and usually uncinate and denticulate beaks ; 

 occasionally an avicularium with a very narrow mandible situated on the summit of 

 a tall, thick column. 



Portland, Mr. Maplestone. 



The specimen I have measures 7 inches by 4, and the height 

 of the highest foliations is 3 inches. It is of an ashy-grey 

 colour. The base is broad and almost entirely covered by the 

 thick, erect lobes which run in a sub-parallel direction across 

 the zoarium. These are more numerous and of much greater 

 size and thickness than in C. prolifera, from which also it differs 

 somewhat in the structure of the operculum. 



Explanation of Figukes. 



Plate 166. — Fig. 2, young marginal zooecia. Fig. 2a, zooecia from older part of same 

 specimen, showing also growing ooecia, sessile vicarious avicularia, and small avicularium on thick 

 column. 



Plate 168.— Fig. 10, operculum. 



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