AND PORTLAND OOLITE OF WILTS, ETC. 561 



ZOANTHABIA PEBFOBATA. 



Family PORITIDJE. 



Subfamily Poeitinj;. 



Genus Dimoephae^ia, De From. 



DlMOEPHAE^A, Sp. 



I have received several hollow casts of a species of Dimorpharcea, 

 from the Coral Bag of Upware, Cambridgeshire, which furnish very 

 good impressions of the calicular surface, and in one of them are 

 some portions of the corallum itself. These show the synapticulaB 

 and the perforations of the septa distinctly, and enable me to deter- 

 mine the genus satisfactorily ; but without more perfect specimens 

 T prefer to defer a description of the species for the present. Better 

 preserved examples are desirable for this purpose ; but I may 

 observe that it differs from all the DimorpharcecB I have seen in 

 having a much greater number of calices. The inner circle, which 

 surrounds the central calice, is only about two lines distant from 

 it, and all the other circles are only that distance from each other. 

 In the circles the calices are very closely placed. 



Prom the number of fragments I have seen 1 should suppose that 

 it is common at Upware. 



Genus Latijoeandear^a, De From. 



This genus was created by M. de Fromentel in 1 856 for some 

 corals from the Corallian of France, for which the name of Mean- 

 drarcea was proposed three years afterwards by M. Etallon *. The 

 former name has the priority; but I am not aware that it was 

 made known until the publication of M. de Fromentel's valuable 

 little work on fossil corals in 1858-61 f. The genus is charac- 

 terized by not having a visible wall, by the presence of synapticulse, 

 which structurally resemble those of Disarcea and Microsolena, by 

 calices which are shallow but distinct, and separated by somewhat 

 elevated but obtuse ridges, confluent septa, a rudimentary colu- 

 mella, and a thin but well- developed epitheca. 



By the kindness of M. de Fromentel I have now before me some 

 specimens of Latimceandrarcea corallina, from the Corallien Inferieur 

 of Champlitte, and with their assistance I have been enabled to 

 determine the generic position of the two species I am about to 

 describe. I must add that in one of these there is very distinct 

 marginal gemmation, and a leaf-like growth, just as in the Astrae- 

 aceaaan genus Phyllogyra, to which, excepting for the presence of 

 synapticulaa and distinctly perforate septa, it might be referred. 



At page 440 of my communication on the Corals of the Inferior 

 Oolite of Gloucestershire J, I have observed of some species of the 



* Etud. Paleont. Haut. Jura, p. 123 (1859). 



t Etud. Polyp. Fobs. p. 247 (1 858-01). 



J Quart. Jouru. Geol. Soc. vol. xxxviii. (1882). 



