Zoology.] NATURAL HISTORY OF VICTORIA. [Polyzoa. 



Plate 89, Fig. 1. 



CATENICELLA INTERMEDIA (P. McG.). 



[Genus CATENICELLA (Blainv.). (Sub-kingd. Mollusca. Class Polyzoa. Order Inf un- 

 dibulata. Sub-ord. Cheilostomata. Fam. Catenicellidse.) 



Gen. Char.—" Cells arising one from the upper and back part of another by a short corneous 

 tube, all facing the same way and forming dichotomously divided branches of an erect phytoid 

 polyzoary ; cell at each bifurcation geminate ; each cell with two lateral processes, usually 

 supporting an avicularium. Ovicells either subglobose and terminal, or galeriform and placed 

 below the opening of a cell in front."] 



Description. — Cells large, broad, rounded. Mouth lofty, narrow, arched above, 

 lower lip slightly rounded upwards and forwards, and sometimes with a very 

 minute sinus in the centre. Front with 5 large fenestras. Lateral processes very 

 wide, forming a wide cup above, and with a depression for a large avicularium on 

 the outside. Back of cell smooth. 



Reference.— P. H. MacGillivray, Trans. Roy. Soc. Vict. 1868. 



Port Phillip Heads. 



It may be distinguished from C. plagiostoma by the nearly 

 vertical mouth, the smaller fenestra?, and the absence of the 

 peculiar enormous avicularia. The lateral process is usually 

 absent or abortive on one side. 



Explanation of Figures. 



Plate 89. — Fig. 1, fragment, natural size. Fig. la, front of cells, magnified. Fig. lb, back 

 of cells, magnified. 



Plate 89, Fig. 2. 

 CATENICELLA AMPHORA (Busk). 



Description. — Cells oval. Mouth arched above, nearly straight below. Front 

 with a narrow, vertical, elliptical opening- below the mouth, and a series of 9 pyriform 

 fenestrae radiating to the circumference. Lateral processes of considerable size, 

 occupying the upper angles, and produced into short points directed upwards, of 

 nearly equal size; on one or both, below the point, is a small avicularian chamber. 

 Back of cell smooth, with a broad, elevated, vertical band, giving off on each side a 

 narrower band to the back of the avicularium. 



Reference. — Busk, Brit. Mus. Cat. Mar. Polyzoa, Pt. i. p. 8, pi. iv. f. 4, 5. 

 Port Phillip Heads, Mr. J. B. Wilson. 



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