FROM THE CRETACEOUS FORMATIONS. 45 



c. Med Chalk of Hunstanton. 



36. Cydolites polymorpha, Goldfuss, sp. 



37. Podoseris mammiliformis, Duncan. 

 88. „ elongata, „ 



39. Micrabacia coromda, Goldfuss, sp., and variety. 



D. Gault. 



40. Carophyllia Bowerbanki, Ed. and H., and a variety. 



41. Trochoci/athus conulus, Phillips, sp. 



42. „ Wiltshirei, Duncan. 



43. „ Harveyanus, Ed. and H., and five varieties. 



44. Bathycyathus Sowerbyi, Ed. and H. 



45. Leptocyatlms gracilis, Duncan. 



46. Cyclocyathus Fittoni, Ed. and H. 



47. SmilotrocJms elongatus, Duncan. 



48. „ granulatus, „ 



49. „ insignis, „ 



50. „ cylindricus „ 



51. Trochosmilia sulcata, Ed. and H. 



52. Micrabacia Fittoni, Duncan. 



E. Lower Greensand. 



53. BrachycyatJms Orbignyanus, Ed. and H. 



54. Smilotrochus Austeni, „ 



55. Trochosmilia Meyeri, Duncan. 



56. Isastrcea Morrisii, „ 



57. Turbinoseris Be-Fromenteli, Duncan. 



58. Holocystis elegans, Lonsdale, sp. 



Micrabacia coronula is common to the Upper Greensand and the Red Chalk. 

 Smilotrochus elongatus is found in the Gault and in the Upper Greensand. 



The number of species of Madreporaria in the British Cretaceous formations is 

 therefore fifty-six. 



MM. Milne-Edwards and Jules Haime had described twenty-three species before this 



