INTRODUCTION. xlix 



14. Genus Cycloseris. 



Milne Edw. and J. Haime, Comptes rend., t. xxix, p. 72, 1849. 



Corallum simple, free, and discoidal. Septa very numerous, and united by their inner 

 edge. Wall completely horizontal. 



Typ. sp., Cycloseris cyclolites, nob. ; Fungia cyclolites, Lamarck., Hist, des Anim. sans Vert., t. ii, p. 236. 



15. Genus Diaseris. 



Milne Edw. and J. Haime, loc. cit., p. 72, 1849. 



Corallum simple, free, and discoidal ; when young, composed of a certain number of 

 separate, radiating lobes, which, in the adult state, become cemented together. General 

 structure as in Cycloseris. 



Typ. sp., Diaseris distorta, nob. ; Fungia distorta, Micbelin, in Guerin's Mag. Zool., t. v, Zooph., 

 pi. v, 1843. 



16. Genus Trochoseris. 



Milne Edw. and J. Haime, loc. cit., p. 72, 1849. 



Corallum simple, trochoidal, adherent. Septa very numerous, and strongly granulated. 

 Typ. sp., Trockoseris distorta, nob. ; AnthophyUum distortum, Michelin, Icon. Zoopb., pi. xliii, fig. 8. 



17. Genus Cyathoseris. 



Milne Edw. and J. Haime, loc. cit., p. 72, 1849. 



Corallum composite, trochoid, adherent. Calices rather distinctly radiate. Septa long 

 and thick. Common basal walls, sometimes forming folds, which rise up so as to con- 

 stitute lobes or ridges on the upper surface of the corallum. 



Typ. sp., Cyathoseris infundibuliformis, nob. ; Agaricia infundibuliformis, Micbelin, op. cit., tab. 

 xliii, fig. 12. 



18. Genus Lophoseris. 



Milne Edw. and J. Haime, loc. cit., p. 72, 1849 ; Pavonia (ex parte), Lamarck, op. cit., t. ii, p. 238, 1816. 



Corallum composite, foliaceous, and adherent, rising in the form of irregular crista? or 

 of lobes, with confluent, radiate calicules on each side. Columella tubercular. 



Typ. sp., Lophoseris boletiformis, nob. ; Pavonia boletiformis, Lamarck, loc. cit., p. 240. 



19. Genus Agaricia. 



(Pars) Lamarck, Syst. des Anim. sans Vert., p. 375, 1801. 



Corallum composite, foliaceous, and irregular. Calices arranged in concentric series, 

 separated by unequal ridges. Columella tubercular. 



Typ. sp., Agaricia undata, Lamarck, loc. cit. ; Madrepora undata, Solander and Ellis, Zooph., tab. xl. 



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