REPORT ON THE POLYZOA. 35 



Cellepora megasoma, MacGillivray. 



? Lepralia megasoma, MacGillivray, Zool. of Vict., dec. iv. p. .33, pi. 38, fig. 5. 



Cellepora megasoma, MacGillivray, Tran.s. Roy. Soc. Vict., vol. xxi. p. 115, pi. iii. fig. 5 ; Zool. of 



Vict., dec. XV. p. 183, pL 148, fig. 1. 

 Cellepora cylindviformis, Busk, ZooL Chall. Exp., part xxx. p. 201, pi. xxx. fig. 9 ; pi. xxxvi. 



fig. 9. 



An unnamed specimen from Station 142, which I brought from Edinburgh, is the 

 Cellepora cylindriformis of Busk, and at first incrusts a piece of seaweed, and then grows 

 free in a cylindrical form. 



Habitat. — Station 142, 150 fathoms; and Port Phillip Heads (MacGillivray). 



Cellepora pumicosa, Busk [non L.), var. eatonensis, Busk. 



Cellepora eatoneyms, Busk, Zool. Chall. Exp., part xxx. p. 201, pi. xxix. figs. 4, 6, 8 ; pi. 

 xxxvi. figs. 3, 4, 5. 



This differs but slightly from the European Cellepora pumicosa ; the avicularium 

 is round instead of triangular. The ovicell is globular, in older cells immersed, and has 

 the small semicircular mark already alluded to. 



Named .specimens from Station 315, 12 fathoms, and unnamed ones from Station 149, 

 20 fathoms, examined. 



Cellepora hicornis. Busk. 



Cellepora hicornis, Busk, Zool. Chall. Exp., part xxx. p. 202, pi. xxx. figs. 1, 12; pi. xxxvi. 

 figs. 13, 1.5. 



This I found on Cellaria from Station 151, 75 fathoms. Both in this and in speci- 

 mens from Marion Island, in the Challenger Office, the ovicell has a small semicircular 

 flattened area. It is probable that some of the other Challenger Celleporie will be found 

 to be identical with this, and perhaps that it has already been described by MacGillivray. 



Cellepora conica. Busk. 



Cellepora conica, Busk, Zool. Chall. Exp., part xxx. p. 203, pi. xxviii. fig. 10; pi. xxxvi. figs. 1, 2. 



Upon making preparations of the chitinous elements of a small cylindrical piece 

 brought from Edinburgh, which Mr. Busk had named Cellepora simonensis, the cor- 

 respondence with the very characteristic elements of Cellepora conica was apparent, 

 and it was clear that Cellepora conica may also grow as a solid cylindrical branching- 

 form. This shows how artificial are the divisions instituted by Mr. Busk, based on 

 the form of the zoarium, and misled even Mr. Busk himself. The orifice is somewhat 



