xlvi BRITISH FOSSIL CORALS. 
confluent, and not circumscribed in the compound species. Sepfa not distinct from the 
costee, and formed by complete, imperforate laminze, with the edge dentate, and the sides 
covered with styliform or echmulate processes, which, in general, meet so as to constitute 
numerous syvapaticule, or transverse props, extending across the loculi like the bars of 
a grate. No dissepiments or tabulz, so that no part of the visceral chamber is completely 
closed. Walls basal, in general porous. ‘The compound species increasing by sub- 
marginal gemmation, and not by fissiparity. 
First Tribe—CYCLOLITIN &. 
Corallum simple. Plate or basal wall having a well-developed epitheca, presenting 
concentric folds. 
1. Genus CYCLOLITES. 
Lamarck, Syst. des Anim. sans Vert., p. 369, 1801. 
Corallum circular, or nearly so, and covered with an immense number of very thin 
septa. Fossula oblong, narrow, and shallow. The small septa in general united to those 
of the older cycla. 
Typ. sp., Cyclolites elliptica, Lamarck, loc. cit., p. 234. 
2. Genus PALmMOCYCLUS. 
Milne Edw. and J. Haime, Comptes rend. de l’Acad. des Sc., vol. xxix, p- 71, 1849. 
Corallum circular. Fossula deep, very broad, and circular. Septa thick and not 
numerous ; none of them cemented together. 
Typ. sp., Paleocyclus porpita, Milne Edw. and J. Haime, loc. cit.; Madrepora porpita, Fougt, Lin. 
Ameen. Acad., t. i, tab. iv, fig. 5. 
Second Tribe—FUNGIN AB. 
Corallum simple or composite. P/ade or basal wall without an epitheca, in general 
strongly echinulate, and porous. 
3. Genus FUNGIA. 
(In parte) Lamarck, Syst. des An. sans Vert., p- 369, 1801; Dana, Zooph., p. 287, 1846; Milne Edw. 
and J. Haime, Comptes rend., t. xxix, p. 71, 1849. 
Corallum simple, subdiscoidal. Septa very numerous, and united so as to appear 
ramified. Basal wa// strongly echinulate, and perforated in an irregular manner. 
Typ. sp., Fungia patellaris, Lamarck, loc. cit., p- 236; Milne Edw. and J. Haime, Ann. des Sc. Nat., 
tpix; playa; ies 
