164 Notes on the Cheilostomatous Polyzoa 



2. B. tuba, Busk. Queenscliff and Western Port. 



II. Gen. Halophila, Gray. 



1. H. Johnstonice, Gray. Sealers' Cove, Dr. Mueller. 



III. Gen. Bugula, Oken. 



1. B. neritina, Lamx. Queenscliff and. Hobson's Bay. 



2. B. avicularia, Pall. Hobson's Bay. 



3. B. dentata, Lamx. Hobson's Bay. 



VIII. Fam. Flustrad^:, Gray. 



I. Gen. Flustra, L. 



1. F. denticulata, Busk. Queenscliff; King's Island, 

 Mr. McGoAvan ; Port Curtis, Mr. Griffiths. 



None of my specimens present the large, flat, marginal 

 processes described and figured by Busk. In some there are 

 two or four stout spines at the margins of the mouth ; while 

 in one form from King's Island they are entirely wanting, 

 and the upper half of each cell is provided on either side with 

 four or five short, sharp, conical processes arching over the 

 cell. The series of minute marginal denticles, and the pecu- 

 liar form of the avicularium are the only constant characters, 

 and afford a ready means of recognising the species. 



II. Gen. Carbasea, Gray. 



1. C. pisciformisy Busk. Queenscliff, Mrs. Robertson. 



2. C. dissimilis, Busk. Queenscliff; King's Island, Mr. 



McGowan. 

 Specimens received from Queenscliff and King's Island 

 have a small, blunt, marginal process on either side of the 

 mouth; in the form of the marginal cells, however, and the 

 constant presence of the peculiar avicularium at the base of 

 each cell, they agree perfectly Avitk the Tasmanian form. 



3. C. episcopalis, Busk. Queenscliff; King's Island, 



Mr. McGowan. 



4. C. cyathiformis, P. McG. Queenscliff; Cape Otway, 



Mr. J. Payter. 



