The Anatomy of the Madreporaria : II. 



By 



G. Herbert Fovrler, B.A., 



Keble College, Oxon., Berkeley Fellow of the Owens College, Manchester. 



With Plate I. 



In a previous paper (4), I have described the anatomy of a 

 solitary Imperforate coral, Flabellum; and of a branching 

 Perforate, Rhodopsammia. The present memoir treats of two 

 examples of colonial Perforate forms, Madrepora Durvillei 

 and M. as per a. 



Madrepora Durvillei (Milne-Edw. and Haime). 



Two fragments of this perforate Madreporarian were kindly 

 entrusted to me for study by Professor H. N. Moseley, who 

 had obtained them during the voyage of H.M.S. ''Challenger." 



The species was founded by Milne-Edwards (1) from a part 

 of the M. rosea of Esper, but as his account is very incom- 

 plete, Mr. J. J. Quelch, of the British Museum, has furnished 

 the following description of the coral. I am glad to be able to 

 take occasion to thank him for this and many other courtesies. 



A. ^' Corallum arborescent, spreading, and remotely ra- 

 mose, or occasionally sub-prostrate, and almost destitute of 

 branchlets on the under surface. Branches often nearly 2 

 cm. thick, becoming very thin towards their extremity, sub- 

 terete, elongated, covered irregularly with crowded capillary 

 polyp-bearing branchlets, which generally give to the branches 

 a sub-cylindrical outline of about 3 — 5 mm. in diameter. 



VOL. XXVII, PART 1. NEW SEB, A 



