INTRODUCTION. XXxl 
8. Genus AMPHELIA. 
Milne Edw. and J. Haime, loc. cit., p. 69, 1849. 
Corallum arborescent, with coalescent branches, and well-developed ccenenchyma im 
aged parts; gemmation subterminal, regularly alternate. Calice deep. Columella 
rudimentary. Septa slightly exsert, entire, and small. No distinct coste; the surface of 
the corallum smooth or very delicately striated. 
Typ. sp., Amphelia oculata, nob. ; Madrepora oculata, Esper, tab. xii. 
9. Genus DIPLHELIA. 
Corallum resembling Amphelia, but having a large co/wmel/a and denticulated septa. 
Typ. sp., Diplhelia raristella, nob. Oculina raristella, Defrance, Dict. des Sc. Nat., vol. xxxv, p. 356. 
10. Genus ENALLHELIA. 
D’Orbigny MSS. ; Milne Edw. and J. Haime, loc. cit., p. 69, 1849. 
Differs from Amphelia by the shallowness of the calices, a greater development of the 
septa, and the existence of long costal striz. 
Typ. sp., Enallhelia compressa, D’Orbigny ; Lithodendron compressum, Goldfuss, op. cit., tab. xxxvii, 
fig. 11. 
§ 2. Septa equally developed, and forming apparently a single cyclum. 
ll. Genus AXHELIA. 
Milne Edw. and J. Haime, Compt. rend., t. xxix, p. 69, 1849. 
Corallum arborescent, with coalescent branches, and a well-developed coenenchyma, the 
surface of which is entirely covered with sub-granulose strize. Calices very shallow. 
Columella compact, very thick, and termimated by a rounded tubercle. No pali. Septa 
exsert, entire. 
Typ. sp., Avhelia myriaster, nob.; Oculina myriaster, Valenciennes MSS., Catal. of the Museum of 
Nat. Hist. of Paris. 
12. Genus CRYPTHELIA. 
Milne Edw. and J. Haime, loc. cit., p. 69, 1849. 
Corallum arborescent, flabellate, and unifacial, all the corallites opening on one of the 
surfaces of the flabellum ; surface of the branches quite smooth. Calices very prominent, 
pediculate, explanate, and folded in two. No columella nor pali. 
Typ. sp., Crypthelia pudica, Milne Edw. and J. Haime, loc. cit., p. 69. 
