38 



BRITISH FOSSIL CORALS 



The flat base, the flat costae, and the limitation of the septal number to four cycles, 

 distinguish this species from Micrabacia coromla^ of the Upper Greensand, and from 

 Micrabacia Beaumontii^, Ed. and H., of the Neocomian. 



List of New Species from the Gault. 



Variety of Caryophyllia Boioerbanki, Ed. and H. 



Five varieties of Trochocyatlms Harvei/anus, Ed. and H. 



Trochocyathus WiltsJdrei, Duncan. 



Leptocyathus gracilis, „ 



Smilotrochus elonyatiis, „ 



„ granulatus, „ 



„ insiynis, ,, 



„ cylindricus, „ 



Micrabacia Fittoni, „ 



III. — List of Species from the Gault. 



1. Caryophyllia Bowerbanki, Ed. and H., and one variety. 



2. Trochocyathus conulus, Phillips, sp. 



3. „ Wiltshirei, Duncan. 



4. ,, Harveyanus, Ed. and H., and five varieties. 



5. Bathycyathus Sowerbyi, Ed. and H. 



6. Leptocyathus gracilis, Duncan. 



7. Cyclocyathus Fittoni, Ed. and H. 



8. Smilotrochus clongatus, Duncan.^ 



9. granidatus, „ 



10. „ cylindricus, „ 



11. „ insignis, „ 



12. Trochosmilia sulcata, Ed. and H. 



13. Micrabacia Fittoni, Duncan. 



> ' Hist. Nat, des Coral.,' vol. iii, p. 30. 



2 Ibid., p. 30. 



3 Common to the Gault and Upper Greensand. 



