XXil BRITISH FOSSIL CORALS. 
13. Genus ENDHELIA. 
Milne Edw. and J. Haime, loc. cit., p. 69, 1849. 
Corallum of the same general form as in the preceding genus, but with the corallites 
alternate on the branches, which are thick and coalescent. Ca/ices immersed ; their border 
not projecting, but armed with a tongue-shaped process. No columella nor pall. 
Typ. sp., Endhelia Japonica, Milne Edw. and J. Haime, loc. cit., p. 69 (Mus. of Leyden). 
14. Genus STYLASTER. 
Gray, Zool. Miscel., p. 36, 1831; Allopora, Ehrenb., Cor. Roth. Meeres, p. 147, 1834; Dana, op. cit., 
p- 693, 1846; Milne Edw. and J. Haime, loc. cit., p. 69, 1849. 
Corallum arborescent and subflabellate ; cconenchyma highly developed, smooth, and 
presenting certain excrescences or tubercles, the nature of which is problematic. Calices 
rare and not projecting much. Neither co/wmella nor pali. 
Typ. sp., Stylaster rosea, Gray, loc. eit.; Oculina rosea, Lamarck, op. cit., t. xi, p. 287; Esper., 
tab. xxxvi. 
Transitional Group. 
PSEUDOCULINID/. 
Corallum composite, with a highly developed, spongy, or cellulose, echimulate, dermic, 
coenenchyma. Costal apparatus rudimentary. Walls imperforate, and never invading the 
visceral cavity. Septal apparatus well developed; dissepiments few in number. 
This small group participates of the characters belonging to the Ocwlinide and the 
Astreide, but differs essentially from both. It does not, however, present any important 
structural peculiarity, and does not appear to be derived from a special zoological type. 
1. Genus Mapracts. 
Milne Edw. and J. Haime, Comptes rend. de l’ Acad. des Sce., t. xxix, p. 70, 1849. 
Corallum arborescent ; coenenchyma almost compact, and highly echinulated.  Calices 
unarmed. Colwmeila styliform. Septa exsert and equally developed. 
Typ. sp., Madracis asperula, Milne Edw. and J. Haime, loc. cit., p. 70; Dentipora asperula, Gray, 
MSS. British Museum. 
2. Genus STYLOPHORA. 
Schweigger, Beobacht. auf Natur., t. v, 1819; Sideropora and Stylopora, Blainville, Manuel d’Actinologie, 
p- 348, 1830; Sideropora, Milne Edw. and J. Haime, loc. cit., p. 70, 1849. 
Corallum arborescent ; coenenchyma sub-compact, with a granulated surface. Calices 
armed with a labial process near the upper part of their margin. Colwmel/a styliform. 
Typ. sp., Stylophora pistillaris, Schweigger, loc. cit. ; Madrepora pistillaris, Esper., tab, Ix. 
