140 PKor. p. MARTi» Duncan's revision op the 



G-enus Reussastb^a, cfAchiardi, Coralli Bocen. del Friuli 



(Pisa, 1875), p. 67, tav. 13. fig. 2 ; amended. 

 Colony in tlie shape of a lamina more or less tHck. Calices 

 distinct, numerous, varying in their distances, shallow. Septa 

 confluent with those of neighbouring calices. Columella lamellar 

 and essential. Calicular wall ill defined. Dissepiments well 

 developed, arched. Synapticula exist ; and the solid septal laminae 

 are very granular. 



Distribution. — Fossil. Eocene : Europe, Sind, Asia. 



G-enus DiMORPHASTRiEA, d^Orhiffny, Bev. et Mag. de Zool. p. 177 



(1850), amended ; Milne-Edwards Sf Jules Kaime, Hist. Nat. 



des Oorall. vol. ii. p. 585 (1857). 



The colony is pedunculate or not, flat on the upper surface, 



rarely convex, more or less circular in outline. Corallites 



arranged around a large central parent in distant concentric 



circles. Columella papillary and small. Septo-costge confluent. 



Synapticula exist. Common wall striated or not, naked. 



Distribution. — Fossil. Cretaceous : Europe, Hindostan, Asia. 



Grenus Dimoephoc(enia, de Fromentel, Polyp, foss. de V Stage 

 NeoGomien, p. 55 (1857). 



Colony in a tolerably thin lamina. Corallites disposed in con- 

 centric rows around a central parent. Plateau naked and costu- 

 lated. The septa are entire, and almost all radiating from the 

 centre to the circumference. There is no columella. 



M. de Eromentel states that this genus corresponds in the 

 Eusmilian family with the genus DionorpJiastrcea, the distinction 

 being the entire nature of the septa in tbe first-named genus and 

 the absence of a columella. There are synapticula. 



Grenus Sttlom^andea, E. de Fromentel, Pal. Frang., Terr, 

 cret. p. 457 (1877). 



The genus Stylomceandra, according to M. de Fromentel, is 

 clearly allied to the genus Latimceandra, and is only really dis- 

 tinguished by having a stylif orm columella in the centre of the 

 calices. 



The figure shows (pi. 113. fig. 3) a broad colline covered 

 by confluent costse. It appears that this genus is hardly near 

 Latimceandra, and that it is possibly one of the Thamnastrsean 

 alliance, where it is placed with doubt. 



