CORALS OF THE CRAG. 



whereas the B. pr&longa and the B. Gravesii 1 of the Paris basin have a narrow peduncle; 

 from B. cylindrical (a Miocene species found at Turin and Verona), B. geniculate? (a fossil 

 belonging to the Nummulitic formation of Port des Basques), and B. Cuminyii 4, (a recent 

 species from the Philippine Islands), by the existence of the fifth cyclum of septa ; and from 

 B. tenuistriata (fossil of the Paris basin), B. desmophyllum 5 (fossil of the London Clay), 

 B. italica 6 (fossil of the Pliocene deposits of Asti), and B. Bairdiana (a recent species), 

 by its general form, and the slight elongation of its calice. The species which it most 

 resembles is B. verrucaria, which exists at the present period on the coast of Corsica ; 

 but in the latter the columella is less developed, and the arrangement of the septa of the 

 last orders is less regular. 7 



Balanophyllia calyculus is common in the Red Crag of Sutton, but has not, to our 

 knowledge, been met with in other localities. Mr. Searles Wood considered it as identical 

 with some fossil Coral found in the Faluns of Touraine, but the latter are young specimens 

 of the JDendrojj/iyllia arnica ; they resemble B. calyculus by their epitheca, but are easily 

 recognisable by the mode of arrangement of their septa, and their multiplication by 

 gemmation when in the adult state. 8 



We have examined numerous specimens of this species in the collections of the 

 Geological Society of London, of Messrs. Bowerbank and Searles Wood, of the Museum of 

 Natural History, and of MM. D'Archiac, Michelin, and Milne Edwards, in Paris. 



1 Turbinolia Gravesii, ibid., pi. xliii, fig. 7 • 



2 Turbinolia cylindrica, Michelin, ibid. pi. viii, fig. 19. 



3 Caryophyllia geniculatu d'Archiac, Mem. Soc. Geol. France, 2d series, vol. ii, pi. vii, fig. la. 



4 See our Monograph of Eupsammidae, Ann. des Sc. Nat., 3 me serie, vol. x, pi. i, fig. 8. 

 6 See tab. vi, fig. 1. 



6 Caryophillia italica, Michelin, Icon., pi. ix, fig. 19. 



7 See our Monograph of Eupsammidae, Ann. des Sc. Nat., 3 me serie, vol. x, p. 85, tab. i, fig. 6. 



8 Loc. cit., tab. i, fig. 9. 



