622 Scientific Proceedings, Royal Dublin Society. 



Three small disc-shaped specimens of Cellepora occur, from 

 Murray Island ; these I have referred to Cellepora discoidea, Busk ; 

 though the rostra are not so strongly developed in the former as 

 in the type specimen of the latter. The walls are thicker, and the 

 upper half of the cell is more ventricose ; indeed, though the mode 

 of growth of the zoarium of these specimens is similar to that of 

 the type, the cells vary almost more than those of Cellepora discoidea, 

 var. frutetosa. 



Cellepora granulosa, Haswell. 

 (PL xvii., fig. 2.) 



The specimen from Albany Passage forms an extensive encrust- 

 ing basal portion, whence arise broad, flattened, hollow branches 

 from various parts, and these again divide. 



In the British Museum Collection are some fragments of this 

 species from Holborn Island, which have been named by Mr. 

 Haswell. They aj>pear to have been broken off from a specimen 

 with narrower branches than those of the present specimen. 



The zooecia are large ; the aperture sub-quadrate. The ooecium 

 is cucullate, smooth, but granular in later stages. The mandibles 

 of the rostral avicularia have their margins bent at an angle to the 

 general surface. Operculum, *3 mm. in width by *26 in length. 



Habitat. — Albany Passage, 8 fms. 



Bipora crassa, Tenison- Woods. 

 (PL xvii., fig. 5.) 



Sixteen specimens, varying from 5 to 10 mm. in diameter, 

 occur, from Murray Island, 15 to 20 fms. 



Figures and measurements of the chitinous appendages are 

 given to further assist in identification. 



Opercula, broadly pyriform, *21 mm. x '16 mm. ; mandibles 

 of avicularia semicircular, - 1 mm. x *06 mm. 



Habitat. — Cape Three Points, 70 to 80 fms. ; Port Stephens 

 N. S. W. (Tenison- Woods) ; Murray Island, 15 to 20 fms., Torres 

 Straits (Haddon). 



