Zoology.] NATURAL HISTORY OF VICTORIA. [Polyzoa. 



Plate 78, Fig. 4. 



BUGULA AVICULARIA (Pall.). 



Description. — Cells biserial, elongated, small; two spines at the upper and 

 outer ang-le, and one at the inner ; aperture occupying the greater part of the anterior 

 surface; avicularia small, capitate, situated on the outer side, close to the margin of 

 the aperture, and at about its middle; ovicell surmounting a cell, rounded, rather 

 contracted below. 



Reference. — Busk, Brit. Mus. Cat., Mar. Polyzoa, p. 45, pi. liii. 



Hobson's Bay, on piles and hulks. 



There can, I think, be no doubt of the identity of this with the 

 well-known European species. It may be distinguished by the 

 small size of the cells, the number and form of the spines, the 

 shape of the ovicells, and the situation of the avicularia. 



Explanation of Figures. 



Fig. 4, fragment, natural size. Fig. 4a, front view of portion, magnified. Fig. 46, single cell, 

 showing ovicell and avicularium, more highly magnified. Fig. 4c, side view of cell. 



I am indebted to Dr. MacGillivray for the typical specimens 

 and descriptions of the species of Bugula on this plate. 



Frederick McCoy. 



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