Ixvi BRITISH FOSSIL CORALS. 
2. Genus AMPLEXUS. 
Sowerby, Miner. Conchol., vol. i, p. 165; Amplexus and Cyathopsis, D’Orbigny, Prodrome de Paléontol., 
vol. 1, 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 tabulz 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. Zabule highly developed. 
Typ. sp., Amplexus coralloides, Sowerby, loc. cit., tab. Ixxii. 
3. Genus MENOPHYLLUM. 
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., Menophyllum tenui-marginatum, nob. 
4. Genus LOPHOPHYLLUM. 
Corallum resembling Zaphrentis, excepting that a crestiform co/wmella 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 Jossula extending much towards 
the centre of the visceral chamber, and ceasing there to be distinct from he bottom of the 
calice. 
Typ. sp., Anisophyllum Agassizi, nob. 
6. Genus BARYPHYLLUM. 
Corallum very short. Calice quite superficial. A slightly developed septal fossula, 
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., 
