Zoology.-] NATURAL HISTORY OFj VICTORIA. [Polyzoa. 



Plate 78, Fig. 1. 



BUGULA ROBUSTA (P. McGill.). 



[Genus BUGULA (Oken). (Sub-kingd. Mollusca. Class Polyzoa. Order Infundibulata. 

 Sub-order Cheilostomata. Fam. BicellariidEe.) 



Gen. Char. — Cells bi-multiserial, closely contiguous ; aperture very large, directed forwards ; 

 the margins not at all or very slightly thickened.] 



Description. — Cells biserial, contracted below, upper and outer angle produced 

 into a short, hollow, conical process ; aperture oval, not extending* to the base; a 

 large, capitate avicularium on the lower part of the cell, below and to the outer side 

 of the aperture. 



Reference. — P. H. MacGillivray, Trans. Roy. Soc. Victoria 1869. 



Western Port. 



The only specimen I have seen forms a tuft, of a greyish-brown 

 color, nearly two inches high. It is readily distinguished by the 

 large size of the cells, with the upper and outer angles produced 

 into the stout, conical processes, as well as the situation of the 

 large avicularia. 



Explanation op Figures. 

 Fig. 1, portion, natural size. Fig. la, small piece, magnified. Fig. 16, back, magnified. 



Plate 78, Fig. 2. 

 BUGULA CUCULLATA (Busk). 



Description. — Polyzoary arranged in a spiral or turbinate form ; cells biserial, 

 elongated ; upper and outer angle produced into a pointed spine, below which there 

 is a smaller spine projecting also upwards and outwards ; inner angle nearly square 

 or prolonged into a minute spine ; aperture occupying about two-thirds of the front 

 of the cell; avicularia capitate, at the outer and lower part of the cell ; ovicell large, 

 saucer-shaped (when dry). 



Reference. — Busk, Journal of Microscop. Science, 1867, p. 241. 



Queenscliff; Portland, Mr. Maplestone. 



Forms elegant tufts, two or three inches high. The cells are 

 usually in small branches, forming fan-shaped tufts, spirally 



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