lxvi BRITISH FOSSIL CORALS. 



2. Genus Amplexus. 



Sowerby, Miner. Conchol., vol. i, p. 165 ; Amplexus and Cyathopsis, D'Orbigny, Prodrome de Paleontol., 



vol. i, p. 105, 1850. 



Corallum resembling Zaphrentis, excepting that the septa do not extend to the centre 

 of the visceral chamber, and leave the upper surface of the tabulae naked and smooth in 

 that part. The septal fossula well characterised in the upper portion of the corallum, but 

 not so on the lower floors. Tabula highly developed. 



Typ. sp., Amplexus coralloides, Sowerby, loc. cit., tab. lxxii. 



3. Genus Menophylltjm. 



Corallum resembling Zaphrentis, excepting that a small septal fossula is situated on 

 each side of the large one, and that one half of the central part of the calice is occupied by 

 an elevated, smooth portion of the tabula, which resembles a crescent. 



Typ. sp., Menophyllutn tenui-marginatum, nob. 



4. Genus Lophophyllum. 



Corallum resembling Zaphrentis, excepting that a crestiform columella occupies the 

 centre of the calice, and is in continuity by one of its ends with a small septum, placed in 

 the middle of the septal fossula, and by the other end with the opposite primary septum. 



Typ. sp., Lophophyllum Konincki, nob. 



5. Genus Anisophyllum. 



Corallum resembling Zaphrentis, excepting by the great development of three primary 

 septa, one of which is placed facing the septal fossula ; this fossula extending much towards 

 the centre of the visceral chamber, and ceasing there to be distinct from the bottom of the 

 calice. 



Typ. sp., Anisophyllum Agassisi, nob. 



6. Genus Baryphyllum. 



Corallum very short. Calice quite superficial. A slightly developed septal fossub, 

 corresponding to one of the branches of a cross, the three other branches of which are 

 constituted by well-developed primary septa. The younger septa not arranged in a regular 

 radiate circle, but inclined obliquely towards the primary ones. 



Typ. sp., Baryphyllum Verneuilanum, nob. 



