56 PKOF. p. MARTIN DUNCAN'S BETISION OF THE 



centrally. Columella small, lamellar. Septa numerous, exsert at 

 tlie margin, upwardly curved, and sloping to the columella, entire, 

 granulate, granules in rows parallel with the free edge. Endo- 

 theca abundant. Epitheca membranous, smooth, covering the 

 costae here and there, not perfect. 



Distribution. — Fossil. Oolite : Nattheim, Europe. 



This genus is too closely allied to Lophosmilia to stand. It is 

 clearly an epithecate subgenus. 



Grenus Pleueosmilia, E. de Fromentel, Bull. Soc. Geol. de 

 France, 2« ser. t. xiii. p. 853 (1858). 



Corallum simple, variable in shape and height, tall or short, 

 Bubturbinate, conico-cylindrical. Calice circular or elliptical. 

 Columella lamellar, projecting or not, united to a large septum, 

 which is more developed than the others. Septa numerous, 

 entire. Endotheca exists. Epitheca strong, covering the wall. 



Distribution. — Fossil. Jurassic : Europe. 



The genus Trismilia, E. de Eromentel, Introd. a I'etude &c. 

 p. 106, is stated to be " tres voisin des Pleurosmilifes," but to differ 

 by having only three primaries developed, and a columella jjyra- 

 midal and triangular in shape. One species, from the Portland 

 Oolite of France, is noticed. 



At present this genus had better be associated with Pleuro- 

 smilia. 



Genus Peplosmilia, Milne-Fdtvards Sf Jules Saime, Brit. Foss. 

 Corals, Pal. Soc, Introd. 1848, p. xxv. 



Corallum simple, adherent by a large base, and is cylindrical. 

 Calice circular or suboval ; fossa well develoj)ed, with a lamellar 

 columella at the bottom. Septa entire, broad, arched, but very 

 slightly exsert at the margin, striated, entire. Endotheca abun- 

 dant. Epitheca strong, membrauiform, complete. 



Distribution. — Fossil. Cretaceous : England. Laube places the 

 genus in the St. Cassian strata of Europe. 



Grenus Blastosmilia, Ftallon, in F. de Fromentel, Introd. d 

 I'etude des polyp, foss. p. 107 (1858-1861) (non Duncan). 



Corallum simple, elongate, slightly bent at the base, and sub- 

 cylindrical. Calice roiind and deep. Columella strong and 

 compressed. Septa in four cycles, moderately thick and slightly 



