FAVIA. 75 



DIPLOKIA M.-EDW. & H. 



Diploria cerebriformis M.-Edw. & H. 

 Not common. 



FAVIACE^ M.-Edw. & H. 

 FAVIA M.-EDW. & H. 



Favia Okkn (pars). 



FissiccUa D.VNA (pars). 



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



Favia M.-Edw. & II. Hist. Nat. des Corall., 1857. 



Favia ananas Oken. 



Madrepora ananas Pallas. 



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



Favia ananas Okex. 



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



Favia ananas M.-Edw. & H. 1. 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 Goniastrgea 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 genei'a is very difficult to be drawn. 



Favia rotulosa M.-Edw. & H. 



Madrepora rotulosa Ell. & Sol. PI. 55. 

 Astrea rotulosa Lamk. 



Rare ; the Museuul possesses only one worn specimen. 



