FAMILIES AND (^EITEEA OF THE MADEEPOEAEIA. 99 



Genus Phyllastr^a, E. de From. 

 Genus D'Achiardia, Duncan. 

 Genera absorbed : — 



FisciCELLA, Dana J Ovalastr^a, d'Orb, ; Ellipso- 

 ccENtA, d'Orb. ; Thalamoccenia, d'Orb. ; Parastr^a, 

 Ed. & H. 



Tribe I. 



Grenus Dichocoenia, Milne-Edwards Sj- Jules Haime, Hist. Nat. 

 des Gorall. vol. ii. p. 199 (1857). 



The colony is massive, pedunculate, hemispherical, lobed, or 

 plane, and the large upper surface presents ".numerous low ca- 

 lices, some circular in outline, others united in short series. Colu- 

 mella small, sublamellar, or subpapillary. Septa well developed, 

 entire, usually exsert. Pali before most of the septa. Costse 

 rather large, spinulose, and merging into the granular, dense, and 

 highly developed intercalicular ccenenchyma, and they are seen 

 to the base. Epitheca rudimentary. Endotheca esists. Increase 

 by fissiparity and upward growth, accompanied by coenenchymal 

 development. 



Distribution. — Fossil. Miocene : West Indies. — Becent. East 

 and West Indies. 



Genus Baetsmilia, Milne-Edwards Sf Jules Uaime, Gompt. Mend, 

 de VAcad. des Sci. t. xxvii. p. 468 (1848), amended. 



The colony consists of a basal peduncle, or stout, tall trunk, on 

 the top of which are variable numbers of coraUites, separated by 

 a ccenenchyma which consists of layers of mural and costal growth. 

 Calices slightly projecting, free, in more or less transverse, straight, 

 and parallel series ; they are subelliptical in shape, and the long 

 axis is perpendicular to the direction of the series. Columella 

 rudimentary or absent. Septa close and slightly exsert, entire. 

 Costse visible from the base and largest near the calices. Epi- 

 theca absent. Endotheca present. Increase by fissiparity and 

 upward growth. 



Distribution. — Fossil. Cretaceous : Europe. Miocene : West 

 Indies. 



Q-enus Stenosmilia, F. de Fromentel, Pal. Frang., Terr. cret. 

 p. 383 (1870). 



Colony massive, pedunculate, large, and convex above. Calices 

 oval, often serial and u asymmetrical, distant, free to a slight 



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