Zoology.-] NATURAL HISTORY OF VICTORIA. {_PoIyzoa. 



Plate 165, Fig. 4. 



CELLEPORA CIDARIS (McG.). 



Description. — Zoarium adnate. ZocBcia ovate, very irregularly arranged; 

 surface finely granular; mouth straight below; below the mouth, at one side, a 

 horizontal elevation, at the inner extremity of which is an avicularium with a small 

 semicircular mandible and serrated beak. At the front of or between the zooecia 

 are numerous tall, stout, hollow, erect, acuminate or blunt processes, thickly and 

 strongly granular or tubercular on the surface. Ocecia of moderate size, globular, 

 sub-immersed. 



Port Phillip Heads, Mr. J. Bracebridge Wilson. 



Explanation op Figorks. 



Plate 165. — Fig. 4, portion magnified, sliowing the large processes, several of which have 

 been broken across. Fig. 4rt, single young zooecium. 



Plate 165, Fig. 5. 

 CELLEPORA BISPINATA (Busk). 



Description. — Zoarium encrusting. Zooecia long, distinct at the growing 

 edge, irregularly heaped and confused in other parts, ovate, granular; mouth at 

 first with a straight lower lip, beneath which is subsequently developed a small or, 

 occasionally, a large blunt mucro, on the inner surface of which is situated a small 

 avicularium with the rounded mandible pointed downwards; a long, stout, articulated 

 spine on each side of the mouth above. Ocecia sub-globular, granular. 



Reference. — Busk, Brit. Mus. Cat., Mar. Pol., pt. ii., p. 87, pi. czx., 

 figs. 1, 2. 



Port Phillip Heads ; Portland, Mr. Maplestone ; Warruambool, 

 Mr. Watts. 



There can, I think, be no doubt that this is the species 

 described by Busk, and that it has no connection with the 

 Discopora alhirostris of Smitt, as supposed by that author, from 

 which it is readily distinguished by the oral spines being distinctly 

 articulated, and by the rostrum being short and blunt. 



Explanation of Fiouees. 



Plate 165. — Fig. 5, specimen, natural size. Fig. 5a, portion from growing edge of same, 

 magnified. Fig. 56, portion from older part, showing also a commencing and fully formed 

 ooecium. 



Plate 168.— Fig. 9, operculum, 



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