Zoology.] . NATURAL HISTORY OF VICTORIA. [Polyzoa. 



Plate 128, Fig. 1. 



CELLEPORA SPECIOSA (McG.). 



[Genus CELLEPORA (Fabricius). (Sub-kingd. Mollusca. Class Polyzoa. Order 

 Infundibulata. Sub-order Cheilostomata. Fam. Celleporidse.) 



Gen. Char. — Zoarium encrusting, partly adnate, massive, foliaceous, erect and ramose, or 

 glomerulous. Zooecia, in the older parts, more or less erect and irregularly heaped together ; 

 one or more rostral processes (occasionally absent), usually bearing avicularia, in the neighbour- 

 hood of the mouth. Generally scattered vicarious avicularia.] 



Description. — Zoarium encrusting-. Marginal zooecia horizontal, older irregu- 

 larly heaped ; surface smooth or finely granular; mouth straight and entire helovv ; 

 2-4 long-, slender spines articulated above ; to one side of the lower lip an elevated, 

 sessile avicularium, the mandible broadly linguate and the rostrum sharply dentate. 

 Vicarious avicularia large, elongated, on elevated calcareous processes, the edges of 

 the rostrum with several strong, recurved teeth. 



Port Phillip Heads. 



I have only seen a single small specimen, growing on a 

 Retepore. It somewhat resembles C. serratirostris, but is distin- 

 guished by the long, articulated spines, the entire lower lip, and 

 the different shape of the mandibles of the oral avicularia. 



Explanation of Figdees. 



Plate 128. — Fig. 1, zooecia from the growing edge. Fig. la, zooecia from an older portion. 

 Fig. \b, vicarious avicularium. 



Plate 128, Fig. 2. 



CELLEPORA SERRATIROSTRIS (McG.). 



Description. — Zoarium encrusting. Zooecia much confused, granulated; the 

 younger, towards the growing edge, decumbent, elongated ; the older more erect, 

 stouter and confused ; mouth at first entire, then with a deep sinus which becomes 

 bridged across or closed by the junction of the opposite angles; a sub-oral process, 

 usually bending to one side, with a large avicularium at the summit. Avicularia 

 very numerous and of various forms, scattered over the zoarium ; some very large, 

 with long, spatulate, blunt or pointed mandibles, raised on considerable boat-like 

 elevations ; some spatulate and smaller ; some on rounded cells, with broad mandibles 

 and serrated rostra. Ooecia rounded. 



Reference.— P. H. MacGillivray, Tr. Roy. Soc. Vict., Dec. 1884. 



Port Phillip Heads. 



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