Zoology.] NATURAL HISTORY OF VICTORIA. [Polyzoa. 



Plate 59, Fig. 7. 



BUGULA NERITINA (Linn.). 



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

 Sub-ord. Cheilostomata. Fam. Bicellariidae.) 



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

 the margins not at all or very slightly thickened.] 



Description. — Cells biserial, elongated, upper edge straight, with the angles 

 projecting; aperture large, occupying nearly the whole front. No avicularia. Ovi- 

 cells large, situated at the upper and inner angles of the cells. 



Reference. — Busk, Cat. Mar. Polyz. Brit. Mus., p. 44, pi. xliii. 



Hobson's Bay ; Queenscliff ; Warrnambool, Mr. Watts. 



Bugula neritina is readily distinguished from the other Victorian 

 species. It forms small tufts of a brownish color. The cells are 

 straight above, each angle projecting as a short spine ; the aperture 

 is very large, the margin very slightly thickened. I have never 

 seen avicularia. The ovicells are large, rounded, situated at the 

 upper and inner angles of the cells. They are pearly white (in 

 dried specimens) and are very conspicuous against the brown of 

 the rest of the polyzoary. 



Explanation op Figures. 



Plate 59. — Fig. 7, portion, natural size. Fig. la, cells, magnified, front view. Fig. lb, cells 

 magnified, back view. Fig. 7c, small portion to shew ovicells, magnified. Fig. 7c?, single cell, 

 viewed from the outside, showing attachment and opening of an ovicell. 



The specimens and descriptions of the above Bicellariidce were 

 presented by Mr. MacGillivray. 



Frederick McCoy. 



Dec. vi. 



[41 ] 



