Zoohgt/.l NATUBAL HISTORY OF VICTORIA. IPoli/zoa. 



Plate 165, Fig. 1. 

 CELLEPORA SIMPLEX (McG.). 



[Genus CELLEPORA (Fabricids). (Sub-kingdom Mollusca. Class Polyzoa. Order 

 Infundibulata. Sub-order Cheilostomata. Family Celleporidse.) 



Gen. Char. — Zoarlum crustaceous, adnate or gloraerulous, or foliaceous and partly free, or 

 massive or ramose. Zooecia erect and confused in the central parts, decumbent at the growing 

 edges ; lower lip straight or nearly so and entire ; one or more rostral processes, usually bearing 

 avicularia, in the neighbourhood of the mouth, but sometimes absent ; usually numerous vicarious 

 avicularia of various forms, frequently raised on calcareous elevations.*] 



Description. — Zoarium encrusting' or adnate. Zocscia large, nearly vertical, 

 slightly projecting; mouth very large, semi-circular above, with a wide, very slightly 

 arched lower lip; occasionally a slightly elevated, broad mucro below the mouth, 

 with a small triangular avicularium having a smooth or serrated beak, or replaced 

 by a large, broad avicularium ; in some young zooecia, a short, articulated spine on 

 each side of the mouth. Vicarious avicularia with moderate sized, broadly ligulate 

 mandibles. 



Port Phillip Heads. 



The specimen from which the figures have been taken is re- 

 cumbent, measures A^ by 3 in., and numerous layers have been 

 superposed on the upper surface until at one part the thickness 

 is nearly half an inch. Below the mouth is sometimes a mucro 

 with a small avicularium, or an avicularium of much larger size 

 without a mucro, as m the figure. The colour is brown. 



Explanation op Figures. 



Plate 165. — Fig. 1, showing zooecia with large avicularia below the mouth, and vicarious 

 avicularia. Fig. la, single zooecium near growing edge, showing mucro and articulated spines. 

 Plate 168. — Fig. 7, Chitinous parts. 



Plate 165, Fig. 2. 



CELLEPORA DIADEMA (McG.). 



Description. — Zoarium small, adnate, yellow. Zooecia short, nearly horizontal 

 at the growing edge, more vertical internally ; mouth sub-circular; in many of the 

 younger zooecia a sub-oral columnar mucro, carrying on its apex a small avicularium 



* The genus Cellepora has been diyided into the sections kotostomata and schizostomata, the first with the lower 

 lip entire, and the inferior edge of the operculum straight, the second with the lip fit-sured, and the operculum with a 

 corresponding rounded or tongue-shaped prucess. It seems to me that these distinctions ought to be considered generic, 

 as In other similar groups; and I would retain the name of Cellepora for the former and propose that of Sckismopora 

 for the latter. The Cellejmrce are usually of large size, massive, decumbent or erect, or bilarainate and variously 

 branched. The Schismoporce, on the contrary, are mostly of smalt size, although occasionally large, as S. megasoma 

 and S, (Cellepora) EytomiisU (Busk), and are frequently glomerular. 



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