52 BRITISH FOSSIL CORALS. 



The calices are either scattered irregularly over the papillate eoenenchyiua or are 

 aggregated in sets ; a parent corallite being surrounded by its buds. The calices are 

 small but slightly projecting, t>ibuliform and finely costulated, the costse being lost in the 

 irregular, porose, and papillate common tissue. Some are not costulated, but are sunken 

 in the coenenchyma, and all are circular in outline with thickish walls. 



The septa are as is usual in the genus ; and the opposite primary septa frequently 

 join by their inner ends. There are six large and six small septa. 



The coenenchyma is highly cellular, and its free surface is almost aciculate with sharp 

 papillae. Locality. Brockenhurst. In the Museum of Practical Geology, London. 



These species of the genus Madrcpora are all new to the British coral-fauna. M. 

 Solanderi is an indifferent species, for there may have been any amount of ornamentation 

 on the coenenchyma, and the calices may have been very prominent and costulate, but 

 nearly every detail has been worn off the specimens. Many well-characterised species, 

 were they worn and rolled, would present the appearance of the typical specimen of 

 M. Solanderi. 



Madrejjora Boevieri is well characterised by its form, its distant tubuliform calices with 

 costulated external surfaces, and by its very granular and echinulate coenenchyma. The 

 species most closely allied to 31. Roemeri is M. granulosa, Edwards and liaime, a recent 

 form from the He de Bourbon. 



The Madrepora Anglica is a well-marked species, and is allied to M. crassa, Edwards 

 and Haime, a recent form whose locality is unknown. 



The genus l\[adrepora comprehends at least ninety-two species, of which only eight are 

 fossil. The Paris Basin and the Turin Miocene have hitherto been the localities whence 

 the fossil species have been collected ; and now the Brockenhurst beds must be admitted 

 amongst the strata whose remains indicate the former existence of coral-reefs exposed to 

 a furious surf and the wash of a gi'eat ocean. 



The Brockenhurst Madrejjorm do not resemble, except generically, the species from 

 Turin. 



The recent species are found all over the Pacific, the Indian Ocean, the Caribbean 

 Sea, and one species has retained its position in the White Sea, near Archangel {M. 

 horealis, Edwards and Haime). 



As yet the very fossiliferous Tertiary strata of the islands of the West Indies have 

 not yielded any fossil Madrepora. 



REMARKS ON THE CORAL-l'AU.VA OF BROCKENHURST. 



The coral-fauna of Brockenhurst and Roydon consists of thirteen species : — Solenas- 

 trcea ceUidosa, S. Koeneni, S. Benssi, S. gemmans, S. Begrichi, S. granidata, Balano- 

 phyllia granidafa, LobojJsammia cariosa, Axopora Michelini, Liiharcea BrockenJiursti, 

 Madrepora Anglica, j\[. Boemeri, M. Solanderi. 



