ON THE BRITISH FOSSIL CORALS. 155 



List of species from the Gault *. 



1. Caryophyllia Bowerbanti, Ed. cf- H., and 7. Cyclocyatlms Fittoni, Ed. 4- H. 



one variety. 8. Smilotrochus elongatus, Duncan t. 



2. Trochocyathus conulus, PhiUips, sp. 9. granulatus, Duncan. 



'S. Wiltsliiri, Duncan. 10. cylindricus, Duncan. 



4. Harveyanus, Ed. 4- H., and five 11. msigvAi, Duncan. 



varieties. 12. Trochosinilia sulcata, Ed. <f- H. 



b. Bathycyathus Sowerbyi, Ed. % H. 13. Micrabacia Fittoni, Duncan. 



6. Leptocyatbus gracilis, Duncan. 



Corals from the Lower Greensand. 



One species of Coral was described by MM. Milne-Edwards and Jules 

 Haime from the Lower Greensand, in their ' Monograph of the British Fossil 

 Corals.' 



Fitton had noticed a compound coral in the Lower Greensand, and named 

 it Astrcea in his " Essay on the Strata below the Chalk," Geol. Trans. 

 2nd series, vol. iv. p. 352 (1843). In 1847 he called the species Astrcea 

 elegans; and Lonsdale separated it from the Astrteidce under the name 

 Ci/athophora elegans in 1849 (Proceed. Geol. Soc. vol. v. pt. 1, p. 83, 

 tab. iv. figs. 12, 15 : 1849). 



MM. Milne-Edwards and Jules Haime recognized the quadrate arrange- 

 ment of the septa of this species, and classified it amongst the Rugosa, in 

 the family Stauridce. Their Holocystis elegans, Eitton, sp., is a very good 

 species, and specimens are found varying in the size of the corallum and of 

 the calices. 



Since the publication of their ' Monograi^h on the British Corals,' MM. 

 Milne-Edwards and Jules Haime have named a species from Farringdon 

 Smilotrochus Austeni (Hist. Nat. des CoraU. vol. ii. p. 71). I have noticed it 

 inadvertently in my description of the Upper Greensand Corals. In order to 

 complete this part it is introduced here again. 



Family TURBINOLIDJE. 



Division Tuebinoliace.e. 



Genus Smilotkochxjs. 

 Smilotrochiis Austeni, Ed. & H. 



The corallum is regularly cuneiform, very much compressed below, and 

 slightly elongate. The calice is elliptical ; the summit of the larger axis is 

 rounded. Forty-eight costte, subequal, straight, fine and granular. 



Height of the corallum about 1 inch. 



Locality. Farringdon. 



MM. MUne-Edwards and Jules Haime do not mention where the speci- 

 men is deposited. 



The genus Smilotrochus has become of some importance in the palasonto- 



* Tbe following autbors bave written upon tbe fossil Corals of tlie Gault : — MM. Milne- 

 Edwards and Jules Haime, ' Monograph of tbe Britisb Fos.sil Corals' (Pal. Soc) ; ' Hist. 

 Nat. des Coralliaires.' Pliillips, ' Illust. of Geol. of Yorksbire.' Mantell, ' Geol. of Sussex.' 

 Lonsdale in Fleming's, ' Briti.sb Animals.' 



Tbe autbors wbo bave written upon tbe Corals of tbe Lower Greensand are : — MM. 

 Milne-Edwards and Jules Haime, op. cit. Fitton, ' Quart. Journ. Geol. Soc' vol. iii. 

 p. 296 (1847). Lonsdale. ' Proc. Geol. Soc' vol. v. pt. 1. p. 83. M. de Fromentel bas paid 

 especial attention to tbe Frencb Neocomian corals, and C. J. Meyer, Esq., bas enabled nic 

 to study tbe most interesting species in bis collection. 



t Common to tbe Gault and Upper Greensand. 



