FAMILIES AND GENEEA Of THE MADEEPOEABIA. 147 



old ones in consequence of the necessity of founding tlie family 

 Plesioporitidae. 



There are two Subfamilies — the Lophoseridce simplices aud 

 Loplioseridce aggregated. 



1. Subfamily Lophoseridce simplices. 

 I. Alliance TROCHOSERIOIDA. 



Lophoseridse with simple coralkj trochoid, turbinate, conico-cylindrical, 

 or subturbinate. Oalices shallow, rarely deep. Septa very numerous, 

 some uniting, close, imperforate, and united by synapticula. Columella 

 variable or absent. Pali may exist. Epitheca may or may not exist. 



Genus Trochoseris, Ed. & H. 

 Genus Gyroseris, Reuss. 

 Genus Turbinoseris, Duncan. 



Subgenus Pal^oseris, Duncan. 

 Genus Phragmatoseris, Milaschewitsch. 

 Genus Omphalophyllia, Laube. 

 Genus Placoseris, E. de From. 

 Genus Elliptoseris, Duncan. 



G-enus Tkochoseeis, Milne-Edwards Sf Jules Saime, Hist. Nat. 

 des Gorall. vol. iii. p. 57 (1860), date of description in 

 Gonipt. Rend. t. xxix. (1849). 



Corallum simple, trochoid or cylindroid, adherent ; wall naked, 

 and with delicate costal striations. Calices circular, or lobed at 

 the margin, and irregular, shallow. Columella papillary. Septa 

 very numerous, strongly granulated laterally, uniting. Synap- 

 ticula numerous. 



Distribution. — Fossil. Cretaceous : Europe. Eocene : Europe, 

 Asia. — Recent. Philippines. 



Grenus Gtyeoseeis, Beuss ; Milne-Edwards ^ Jules Uaime, Hist. 

 Nat. des Gorall. vol. iii. p. 54 (1860). 



Corallum simple, free, pedunculate, trochoid. Calice shallow, 

 with thick margins, circular. Costal fossette large. Columella 

 large and papillary. Septa not exsert. Wall imperforate. 

 Synapticula exist. 



Distribution. — Fossil. Cretaceous : Europe. 



The morphology of the septa separates the following genus from 

 Leptophyllia and its allies, which belong to the Plesioporitidae. 



10* 



