178 



PROF. P. MAETIN DUNCAN 9 REYISION OE THE 



Milne-Edwards and Jules Haime divide this genus into groups 

 of species : — 



1. Arborescent Dendro^h^lUce. With an arborescent trunk, 



branches arising from it in vertical series, and rami- 

 fying in their turn in an alternate and distichous 

 manner. 



2. Branching DendropJiyllicd. The parent occupies the axis 



of the corallum or colony, and the secondary branches 

 arise around it, forming several vertical series, some 

 uniting when they come in contact. 

 8. IncYu^imgDendrophylliw. Not developing much in height 

 by budding, and resembling an Astrseiform mass, with 

 some coenenchyma. Corallites often uniting about the 

 base. 



Distribution. — Fossil. Eocene : England and Europe. Mio- 

 cene: Europe. — 'Recent. Atlantic, Cape Yerd, Madeira, Medi- 

 terranean, Pacific, Arafura Sea, Chinese and Australian seas. Bay 

 of Panama, Caribbean Sea. 



The genus Brassyia^ B. Wright, Ann. & Mag. Nat. Hist. 18S2, 

 ix. p. 77, was established for specimens of one species. It is a 

 stumpy, broad-based coral, clearly colonial, from the buds upon 

 it, although it is stated to be simple. The only interesting point 

 is that the septa are said not to unite. 



It is synonymous with DendropJiyllia, and is in no way inter- 

 mediate between Dendrophyllia and Bala^iophyllia. 



Subgenus C(ENOPSAMMia, (genus) Milne-Edwards Jules Haime, 

 Hist. Nat. des Corall. vol. iii. p. 125 (1860), amended. 



Colony in tufts, or fasciculate or dendroid, rarely massive. 

 Corallites more or less cylindrical, free or surrounded by coenen- 

 chyma. Calices subcircular. Columella well developed. Septa 

 not exsert, in three complete cycles, and whenever there are higher 

 orders they are rudimentary. Costse delicate, subvermiculate 

 inferiorly, simply granular near the calice. Gremmation lateral 

 and subbasal. Septa and wall differing in the amount of per- 

 foration. 



Distrihution. — Fossil. Pliocene: Europe. — Becent. Indian 

 Ocean, Bed Sea, Pacific, North-Australian seas, New Zealand, 

 Panama, Cape Verd Islands. 



