INTRODUCTION. iiii 



7. Genus Stephanophyllia. 

 Michelin, Diet, des Sc. Nat., Suppl., vol. i, p. 484, 1841. 



Coralluni simple, free, and presenting no trace of adherence. Wall discoidal, 

 horizontal. Calice circular and open. Septa tall, thin, crowded, not projecting laterally 

 beyond the edge of the mural disc, covered with conical granulations on each side, and 

 all, excepting those of the first cyclum, united by the inner edge. Costa delicate, straight, 

 composed of simple series of obscure granulations, and radiating regularly from tht- 

 centre of the mural disc to its circumference. No epitheca. 



Typ. sp., Stephanophyllia elcgans, Michelin, Icon. Zooph., pi. viii, fig. 2. Milne Edw. and J. Haime. 

 loc. cit., tab. i, fig. 10. 



8. Genus Dexdrophyllia. 



Blainville, Diet, des Sc. Nat., vol. lx, p. 319, 1830. 



Corallum composite, and in general arborescent. Corallites cylindrical, or cylindrico- 

 turbinate, and formed by lateral gemmation. Calices circular, or nearly so ; fossula deep. 

 Columella well developed, and in general projecting much at the bottom of the fossula. 

 Septa not exsert, thin, and closely set ; those of the fourth cyclum well developed. Walls 

 becoming very thick, and presenting narrow vermiculate costa, formed by series of granule. 



Typ. sp., Dendrophyllia ramea, Blainville, loc. cit. ; Mdne Edw., Atlas du Regne Animal de Cuvier. 

 Zooph., pi. lxxxiii, fig. 1. 



9. Genus Lobopsammia. 



Milne Edw. and J. Hainie, Ann. des Sc. Nat., 3 rae serie, vol. x, p. 10.5, 1848. 



Corallum composite, arborescent, increasing by successive fissiparity. Calices irregular 

 in form. Septa forming four complete and well-developed cycla. In other respects similar 

 to Dendrophyllia. 



Typ. sp., Lobopsammia cariosa, Milne Edw. and J. Haime, loc. cit. ; Lithodendron cariosnm, Goldfuss. 

 Petref. Germ., vol. i, tab. xiii, fig. 7. 



10. Genus Coinopsammia. 



Milne Edw. and J. Haime, loc. cit., p. 106, 1848; Tubastrea, Lesson, Voyage aux Indes orient, par 



Belanger, 1834. 



Corallum composite, dendroid, or sub-globose, increasing by lateral or sub-basal gemma- 

 tion. Corallites cylindrical. Calices circular, or nearly so. Columella tubercular, well 

 developed. Septa not exsert, distant, and forming three cycla ; those of the fifth order 

 rudimentary. Costa narrow, sub-vermiculate towards the bases, simple, and formed of a 

 series of granulae near the calice. 



Typ. sp., Cceaopsammia coccinea, Milne Edw. and J. Haime, loc. cit., p. 107 ; Tubastrea coccinea, Lesson, 

 op. cit., Zooph., tab. i; Astrea calicularis, Blainville, Manuel d'Actinol., tab. liv, fig. 2. 



11. Genus Stereopsammia. 



Corallum presenting most of the characters of Csenopsammia, but not having any 

 Columella. 



Typ. sp., Stereopsammia humilis, nob., tab. v, fig. 4. 



