Zoology.'] NATURAL HISTORY OF VICTORIA. \^Polyzoa. 



Plate 167, Fio. 4. 

 CELLEPORA MAGNIROSTRIS (McG.). 



Description. — Zoarium small, encrusting, or partially free. Zoeecia large, ovate, 

 distinct, separated by deep grooves, surface granular; mouth straight or slightly 

 sinuous below; immediately below the lip an irregular thickened band, with a small 

 elevation in the middle (possibly an aborted avicularium) ; a long, articulated spine 

 (frequently absent) on each side of the mouth. Ocecia globose, smooth. Numerous 

 scattered, vicarious, much raised avicularia, the rostrum with a smooth or serrated 

 margin, and the mandible crossed by a triangular chitinous band. 



Port Phillip Heads. 



Evidently allied to C. hispinata, but differing in the absence of 

 distinct rostrum with avicularium, and the structure of the large 

 vicarious avicularia. In the figured specimen the ooecium is 

 smooth, and surrounded by a distinct rim ; in other and probably 

 older specimens there is no rim. 



Explanation of Figukes. 



Plate 167. — Fig. 4, specimen, natural size. Fig. 4a, portion magnified, allowing zooecia, 

 ooecium, and large avicularium. The avicularia are usually broader below the sharper point, so 

 as to have a hastate shape. 



Plate 168. — Fig. 17, operculum. 



My friend Mr. MacGUlivray has presented all the type specimens 

 and descriptions of the species of the very important and difficult 

 genus Cellepora., represented on plates 165 to 168, and made the 

 drawings for the lithographer, so as to insure the accuracy which 

 can scarcely be got by the aid of the most skilful artist other than 

 the naturalist actually defining the species ; and the Museum and 

 this work are very greatly indebted to him for the complete 

 illustrations of those Polyzoa, which could not otherwise have been 

 presented to the public. 



Frederick McCot. 



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