xxxiv BRITISH FOSSIL COEALS. 



40. Genus Dasyphyllia. 



Milne Edw. and J. Haime, Comptes rend., t. xxvii, p. 492, 1848. 



Corallum fasciculate, cespitose, and dichotomous. Corallites very long and segregate. 

 Columella spongy. Septa thin, slightly exsert, and armed with apical teeth, the size of which 

 is much greater near the columella than towards the margin of the calice. 



•Typ. sp., Dasyphyllia echinulata, Milne Edw. and J. Haime, Ann. des Sc. Nat., 3 me serie, t. x, 

 pi. viii, fig. 5. 



41. Genus Colpophyllia. 



Milne Edw. and J. Haime, Comptes rend, de l'Acad. des Sc., t. xxvii, p. 492, 1848. 



Corallum sub-glomerate, remarkably light and fragile, composed of series of corallites 

 cemented together laterally, without their respective walls ceasing to be distinct on the 

 calicular surface, where they are parallel, very thin, and constitute a double ridge on each 

 side of the calicular trench. Calices individualized by the direction of their septa. Columella 

 rudimentary, or not existing. Septa extremely thin, broad, and slightly exsert ; their apical 

 edge armed with small delicate teeth, and emarginate near the middle. Dissepiments 

 very abundant, and closing up the loculi almost to the margin of the calice, and forming a 

 vesicular mass. Common exterior walls of the corallum or plate presenting small, lamellar, 

 nearly equal, denticulate costse ; epitheca rudimentary. 



Typ. sp., Colpophyllia gyrosa, Milne Edw. and J. Haime, Ann., t. xi, p. 266 ; Madrepora gyrosa, Ellis 

 and Solander, op. cit. ; tab. li, fig. 2 ; Manicina gyrosa, Ehrenberg, op. cit. ; Mussa gyrosa, Dana, op. 

 cit., p. 186. 



42. Genus Oulophyllia. 



Milne Edw. and J. Haime, Comptes rend., t. xxvii, p. 492, 1848. 



Corallum composed of a series of corallites, intimately united by their lateral walls, 

 which constitute simple ridges between the trenches formed by the aggregate calices. 

 Columella spongy, and in general not highly developed. Septa thin, slightly exsert, closely 

 set, and armed with numerous long, sharp, apical teeth, the size of which augments towards 

 the centre of the corallite. Common exterior walls sometimes covered with a thin epitheca ; 

 multiplication fissiparous. 



Typ. sp., Oulophyllia Stokesiana, Milne Edw. and J. Haime, Ann. des Sc. Nat., vol. x, tab. viii, fig. 10. 



43. Genus Latomeandra. 



D'Orbigny MSS. ; Milne Edw. and J. Haime, Ann. des Sc. Nat., 3 me serie, t. xi, p. 270, 1849. 



Corallum having most of the characters of the preceding genus, but increasing by 

 calicular gemmation. The gyri in general short, the marginal ones distinct, and not forming 

 a common rim. No epitheca. 



Typ. sp., Latomeandra plicata, Milne Edw. and J. Haime, loc. cit., p. 271 ; Lithodendron plicatum, 

 Goldfuss, Petref. Germ., tab. xiii, fig. 5. 



