INTRODUCTION. xxxiii 



36. Genus Symphyllia. 



Milne Edw. and J. Haime, Comptes rend, de l'Ac. des Sc., t. xxvii, p. 491, 1848. 



Corallum composite, massive, short, and increasing by fissiparity. Corattites having dis- 

 tinct calicula, but united in linear series, which are cemented together laterally. The 

 other characters as in the preceding genus. 



Typ. sp., Symphyllia sinuosa, Milne Edw. and J. Haime, Ann. des Sc. Nat., vol. x, tab. viii, fig. 7. 



37. Genus Mycetophyllia. 



Milne Edw. and J. Haime, Comptes rend., t. xxvii, p. 491, 1848. 



Corallum massive, composed of corallites intimately united in series by their walls, 

 which are very thin. Exterior common walls lobulate, spinulous, and presenting but rudi- 

 ments of an epitheca. Calicular grooves, very shallow. No columella, or only rudiments of 

 one. Septa not numerous, scarcely exsert, strongly dentate, and confluent. Dissepiments 

 vesicular, large, and abundant ; loculi closed almost to their top. 



Typ. sp., Mycetophyllia Lamarckiana, Milne Edw. and J. Haime, Ann. des Sc. Nat., vol. x, tab. viii, fig. 6. 



38. Genus Eunomia. 



Lamouroux, Exposit. Metbod. des Polypiers, p. 83, 1824. 



Corallum cespitose, fissiparous ; Corallites segregate, tall, cylindroid. Calices almost 

 circular. Columella rudimentary. Septa not very numerous. Walls covered with a complete 

 membraniform epitheca, strongly striated transversely. 



Typ. sp., Eunomia radiata, Lamouroux, op. cit., p. «3 ; Lithodendron Eunomia, Michelin, Icon., pi. xxxiv, 

 fig. 6; Eunomia Icevis, Milne Edw. and J. Haime, Ann., t. xi, p. 260; Lithod. Iceve, Micbelin, loc. cit., 

 pi. xix, fig. 8. 



39. Genus Calamophyllia. 



Catamites, Guettard, Mem. sur les Sc. et les Arts, vol. ii, p. 404, 1770; Calamophyllia, Blainville, Diet, des 



Sc. Nat., t. lx, p. 312, 1830. 



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

 Calices not very deep. Columella rudimentary or not existing. Septa thin, numerous, 

 crowded, and armed with apical teeth, the size of which increases from the margin towards 

 the centre of the calice. Dissepiments very oblique and crowded. Walls delicately striated, 

 devoid of epitheca, but presenting at certain points circular foliaceous expansions. 



Typ. sp., Calamophyllia striata, Blainville, Diet, des Sc. Nat., pi. cccxii; Calamite strie", Guettard, 

 Mem. sur les Sc, t. iii, pi. xxxiv. 



