100 THE BERMUDA ISLANDS. 



I feel satisfied that this species is identical with the preced- 

 ing, the same stock bearing what might be considered to be 

 typical representatives of both forms. 



The amount of variation in the disposition of the calyces, as 

 well as in their individual shape, is very great in this genus, 

 and I am by no means sure that two or three of the other forms 

 of Oculina here enumerated represent anything more than 

 varietal modifications. Pourtales, in his illustrations of the 

 corals of the Florida reefs (Mem. Mus. Comp. Zoology, VII, 

 plates I and II) correctly refers, it seems to me, both types to a 

 single species (0. varicosd). 



Oculina speciosa, Edwards and Haime. 



Harrington Sound. 



Oculina recta, Quelch. 



One specimen, from Harrington Sound, which agrees in the 

 characters of the species from St. Thomas (Quelch, Challenger 

 Reports, Zoology, XVI, p. 51). The species does not appear 

 to have been hitherto observed in the Bermudian waters. 



Oculina coronalis, Quelch. 



Harrington Sound. First described from the Bermudas 

 (Challenger Reports, Zoology, XVI, p. 49.) 



Quelch, in his report on the reef-building corals of the 

 Challenger (op. tit., pp. 9 and 49), enumerates as an additional 

 member of the Bermudian fauna the Oculina Bermudiana of 

 Duchassaing and Michelotti. I have been unable to find any- 

 thing in the description or figures furnished by these authors 

 (Supplement au Memoire sur les Coralliaires des Antilles, p. 162, 

 pi. IX, figs. 1, 2 Memorie delta Reale Accad. Seienze di Torino, 

 Ser. Sec., XXIII, 1866) to distinguish their species from 

 Oculina speciosa, nor does it appear to me to be distinct. The 

 characters upon which the form is separated are exceedingly 

 trivial, and well within the amount of variability which is 

 presented by individual specimens of nearly all the species of 

 Oculina. I further believe that 0. coronalis, and possibly also 

 0. recta, will have to be united with 0. speciosa. 



