160 



PEOF. P. DUNCAN's REVISION OF THE 



Subgenus Phtlloseris, (genus) Tomes, Quart. Journ. Q-eol. 

 Soc. vol. xxxviii. p. 447 (1883). 



Differs according to its describer wholly in the way in which 

 the fronds are produced (? developed), and in the presence of a 

 strongly developed epitheca, from Protoseris. The only distinc- 

 tion is the presence of an epitheca, w^hich is not generic. Hence 

 the species Phylloseris rugosa, Tomes, must come within the scope 

 of the genus Protoseris. I place Phylloseris as a subgenus of 

 Protoseris. Its sole locality is in the Lower Oolite of England. 



HI. AlUance STEPHANARIOIDA. 

 Colonial Lophoseridse, massive, incrusting, or lobate and subdendroid. 

 Septo-costaj confluent and well developed. Walls absent or indistinct. 

 No collines. 



Genus Stephanaria, Verrill. 

 Genus Pratzia, Duncan. 



Genus Stephanaria, Verrill, Trans. Connect. Acad. i. p. 340 



(1867). 



Colony in short lobe-like branches. Calicos moderately large, 

 with two or three cycles of septa, denticulate on the edge, well 

 developed and confluent. Walls indistinct or wanting ; the 

 division between the calicos indicated only by small granular 

 points, which sometimes interrupt the septa of adjoining calicos. 

 Columella papillose. Paliform papillae before all the principal 

 septa, the inner ones becoming confounded with the columella. 



Distribution. — Becent. West-American coast. 



Genus Peatzia. 



Syn. Plerastrwa, Duncan, Poss. Corals &c. of Sind, 1880, 

 p. 65, Pal. Indica, Ser. xiv. 



The colony is massive, incrusting. Calicos superficial. Colu- 

 mella snbstyloid, produced by the septal ends. Septa solid, 

 arranged in several lozenge-shaped or triangular groups, con- 

 fluent, crowded. Walls absent. Synapticula abundant, close, 

 and reach high up in the interseptal loculi. Endotheca absent. 

 Epitheca absent. 



Distrihution. — Fossil. Eocene of Sind, Asia. 



