ZOOLOGY OF THE BERMUDAS. 101 



Isophyllia australis t Edwards and Haime. 



Three specimens from the North Rock, doubtfully indenti- 

 fied with this species. 



Isophyllia fragilis ? Dana. 



I am unable to satisfy myself as to the' positive existence of 

 this species in Bermuda, although Quelch refers to a single 

 specimen having been obtained there by the Challenger party. 

 Tbis authority doubtfully refers one of the forms figured by 

 Pourtalfes (op. cit, pi. VII, fig. 3) as I. dipsacea to Dana's 

 species, but from an examination of a number of Bermudian 

 specimens which agree absolutely with Pourtal&s's figure I am 

 fairly convinced that this identification is incorrect. The 

 specimens do certainly not agree sufficiently with Dana's de- 

 scription, and if they are not the types of a distinct species, 

 then they represent probably only a certain phase of develop- 

 ment of I. dipsacea, as is indicated by Pourtal6s. 



Isophyllia dipsaoea, Dana. 



Three specimens, from Castle Harbor. 



Isophyllia strigosa, Ducbassaing and Michelotti 



A number of specimens, from Harrington Sound, which 

 agree with the description of this species. I am doubtful as 

 to the species being distinct from Isophyllia dipsacea; possibly, 

 however, some of the varieties (so-called) of the latter species 

 figured by PourtalSs are really members of this species. Its 

 principal distinguishing characters appear to be the thinner 

 and more irregular septa, and the terminal cleft that indents 

 or separates the septa of opposing calyces where they cross the 

 common wall. It also presents a more bristling appearance 

 than /. dipsacea. 



Isophyllia Gnadeloupensis, Portal es. 



One specimen. This appears to be a good species, although 

 by Quelch it is referred to Isophyllia strigosa. 



In addition to these forms Quelch enumerates Isophyllia 

 {Symphyllia) marginata, I. cylindrica, and I. Knoxi, all of 

 Duchassaing and Michelotti, as having been obtained at the 



