THE WEYMOUTH CARPET-CORAL. 339 



Columella. The floor of the cavity is covered with papillary emi- 

 nences, which are very rough, with irregular points, and are identical with 

 the lower edges of the principal plates, by the convergence of which they 

 seem to be formed. 



Plates. Thin above, but increasing in thickness below, scarcely salient, 

 unequal, straight, the surfaces set with irregular granular tubercles, which 

 become increasingly rough and prominent below. 

 The edges are strongly but irregularly notched 

 and toothed, especially below ; but the upper 

 edge of the primaries is for the most part sub- 

 eutire ; the form of the outline varies much. 

 There are normally four cycles in six systems : 

 but the fourth cycle is always wanting either 

 in the whole or in half of some of the systems ; 

 the amount of defection varying much in dif- 

 ferent corallites. The development is very un- hoplangia 

 equal, and the plates of the third or fourth {magnified). 

 cycle are occasionally larger than those of higher rank, even in the same 

 system. 



Size. 



Individual corallites one-eighth of an inch in diameter, and nearly cne 

 fourth in height. 



Animal. Undescribed. 



Locality. 

 Weymouth Bay : deep water. 



When this neat and interesting little Coral first came into 

 my hands, I thought, notwithstanding some peculiarities, 

 that it must be referred to the Phyllangia Americana, a 

 native of the West Indian seas, and so announced it. 

 But I see that there are incongruities which prevent its 

 identification with that or any other recognised genus, and 

 I have therefore founded a new one to receive it. It lias 

 much in common with Angia, as well as Phyllangia, but 

 the above diagnosis will, I think, warrant my decision. 



In forming a generic name, I have followed the plan of 

 M. Milne Edwards in using a common element for the 

 genera of a given family ; though perhaps a little heterodox 

 for stanch Linneans, it has advantages. Taking then the 



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