FAVIA. 75 



DIPLORIA M.-EDW. & H. 

 Diploria cerebriformis M.-Edw. & H. 



Not common. 



FAVIACE^ M.-Edw. & H. 

 FAVIA M.-EDW. & H. 



Favia Oken (pars). 



Fissicella Dana (pars). 



Parastrea M.-Edw. & H. Ann. Sc. Nat., 3« Se'r., t. XII., 1850. 



Favia M.-Ed\V. & II. Hist. Nat. ties Corall., 1857. 



Favia ananas Ok en. 



Madrepora ananas Pallas. 



Madrepora ananas Ellis & Sol. Plate 47, fig. 6. 



Favia ananas Okex. 



Parastrea ananas M.-Edw. & H. 1. c. 1850. 



Favia ananas M.-Edw. & H. I. c. 1857. 



Very common, very nearly up to low-water mark. 



There are many specimens of this species in the Museum, particu- 

 larly young and worn ones, which would undoubtedly be referred to 

 the genus Goniastrosa if seen by themselves. In a series, however, the 

 passage from one form to the other is readily seen, and can even be 

 followed out sometimes in the same specimen. Thus the line of sepa- 

 ration between the two genera is very difficult to be drawn. 



Favia rotulosa M.-Edw. & H. 



Madrepora rotulosa Ell. & Sol. PI. 55. 

 Aslrea rotulosa Lamk. 



Rare ; the Museum possesses only one worn specimen. 



