CORALS FROM THE LOWER CHALK. 55 



the fifth order being rather longer than those of the fourth order. The septa of the fifth 

 cyclum are small, thin, low, and unite to the neighbouring principal septa ; those of the 

 sixth order join the primary ones ; those of the seventh- order adhere by their inner and 

 upper edge to the secondary ones, and those of the eighth and ninth orders to the tertiary 

 septa ; or, in other words, each element of tins fifth cyclum joins the eldest of the two 

 septa between which it is placed. Independently of these junctions, which are normal, and 

 always take place along the inner edge of the septa, the interseptal loculi are irregularly 

 divided in some places by the projecting lateral granulae of two neighbouring septa 

 meeting, and becoming cemented together. By this character, as well as by its general 

 form, this species tends to mite the family of Eupsamniidae with the Eungidae. 



Height of the coralium, one and a half or two lines ; diameter, three or four lines. 

 Some specimens, which were probably not adult, were only two lines and a half in 

 diameter. 



This delicate little Coral differs from Stephanophyllia elegans, S. imperialis, and 

 S. discoides 1 by the form of the septa, which do not appear to be angular and lacerated, 

 as in the three latter species. Stepltanophyllia astreatd' differs from it by having a large 

 fossula and a well-developed columella. It most resembles S. suecica / but in this species, 

 the two tertiary septa of each system unite below the columella and the secondary septa, 

 which consequently do not extend to the centre of the calice ; whereas in S. Bowerbankii 

 these tertiary septa, as we have already stated, adhere to the secondary septa, and these 

 last-mentioned septa extend to the columella. The Fossil Coral figured by M. von 

 Hagenow, under the name of Funyia clathrata* and found by that geologist in the chalk 

 formation of Rugen, is evidently very nearly allied to the British species here described ; 

 but as far as we can judge of it by M. von Hagenow's engraving, it appears to differ from 

 it by its more elevated form, by the strongly-marked concentric striae visible on the mural 

 disc, and by its basis being more prominent. 



We must also remark, that the section of the genus Stephanophyllia, to which this 

 species belongs, and to which we applied the name of Lenticular Stephanophyllia? has of 



1 See our Monograph of the Eupsammidae, Ann. des Sc. Nat., 3 me serie, vol. x. 



2 Fungia astreata, Goldfuss, Petrcf. Germ., vol. i, p. 4/, tab. xiv, fig. 1 (where it is by mistake 

 designated under the name of Fungia radiata). This species not having been, as yet, well characterised, 

 we think it may be useful to give a short description of it here. Coralium simple, very short, and having 

 the form of a plano-convex lens. Calicular fossula circular, and well developed. Costee very delicate 

 and not closely set. Septa forming five complete cycla, and appearing to be thin and strongly granulated. 

 Size very variable ; in the adult, diameter three lines, height about one line. Fossil found at Aix-la-Chapelle, 

 in Westphalia, and existing in the Museums of Bonn and Paris. All the specimens yet found are in a very 

 bad state of preservation. 



3 Monogr. of the Eupsammidae, loc. cit., p. 94. 



4 In Leonhard and Bronn's Jahrbuch fur Mineralogie, 1840, p. 684, tab. ix, tig. 3. 



5 Monogr. of the Eupsammidae, loc. cit., p. 94, 1848. 



