FROM THE LOWER GREENSAND. 



39 



IV. — Corals from the Lower Greensand. 



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

 in his "Essay on the Strata below the Chalk," * Gcol. Trans.,' 2nd series, vol. iv, p. 352, 

 1843. In 1847 he called the species AstrcBa elegans, and Lonsdale separated it from the 

 xistraidcB under the name Cyathophora ? elegans in 1849 (' Quart. Journ. Geol. Soc.,' 

 vol. V, pt. 1, p. 83, pi. iv, figs. 12, 15, 1849). 



MM. Milne-Edwards and Jules Haime recognised the quadrate arrangement of the 

 septa of this species, and classified it amongst the Bugosa, in the family Staurida. Their 

 Ilolocgstis elegmis, Fitton, sp., is a very good species, and specimens are found varying in 

 the size of the corallum and of the calices. 



Since the pubhcation of their ' Monograph on the British Fossil Corals,' MM. Milne- 

 Edwards and Jules Haiuae have named a species from Farringdon Smilotrochus Austeni 

 {' Hist. Nat. des Corall.,' vol. ii, p. 71). I have noticed it inadvertently in my description 

 of the Upper Greensand Corals, p. 19, and PI. VII, fig. 12. In order to complete this 

 part it is introduced here again. 



Family— TURBINOLIDJE. 



Division TuRBlNOLIACEiE. 



Genus — Smilotrochus. 

 1. Smilotrochus Austem, £d. and 11. PI. VII, fig. 12. 



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

 elongate. 



^ The following authors have written upon the Fossil Corals of the Gault ; 



MM. Milne-Edwards and Jules Ilaime, ' ^louograph of the British Fossil Corals ;' Pal. Soc. 

 ,, ,, ' Hist. Nat des Coralliaires.' 



Phillips, ' lUust. of Geol. of Yorkshire.' 



Mantell's ' Geol. of Sussex,' Lonsdale in. 



Fleming, ' British Animals.' 

 The authors who have written upon the Corals of the Lower Greensand are — 



MM. Milne-Edwards and Jules Ilaime, opp. citt. 



Fitton, 'Quart. Journ. Geol. Soc.,' vol. iii, p. 296, 1847. 



Lonsdale, 'Quart. Journ. Geol. Soc.,' vol. v, p. 83. 



M. de Fromeutel has paid especial attention to the French Neocomian Corals ; and C. J. Meyer. 

 Esq., F.G.S., has enabled me to study the most interesting species in bis collection. 



