JV 





A MONOGRAPH 



ON THE 



CRETACEOUS ECHINODERMATA, 



ON THE CRETACEOUS GROUP. 



The Cretaceous group, as a whole, as developed in England, has been so fully 

 described by Conybeare and Phillips, 1 and its subdivisions by other authors, 2 that it 

 appears to be unnecessary to devote any great space to this branch of the subject, beyond 

 an epitomized outline of the subdivisions of the Cretaceous rocks, with brief notes on the 

 species of Echiriida found therein, and the co-relation of these stages with their equivalent 

 zones of life in the Cretaceous systems of the Continent of Europe ; and as the Isle of 

 Wight exhibits some of the best coast-sections of the Cretaceous rocks in the British 



1 The 'Outlines of the Geology of England and Wales' contains a most able account of this formation. 



2 The following, among many others, may be consulted for important information on the Cretaceous 

 formation : — Dr. Fitton's various memoirs in the ' Geol. Transactions,' and ' Quarterly Journal of the Geol. 

 Soc. ;' Sir H. De La Beche, " On the Chalk and Greensand of Lyme Regis," ' Geol. Trans.,' vol. ii ; Young 

 and Bird and Professor John Phillips on the Geology of Yorkshire ; Dr. Mantell's works on the 

 Geology of Sussex ; Samuel Woodward's 'Geology of Norfolk ;' Dixon's ' Geology of Sussex.' The various 

 memoirs in the ' Quarterly Journal of the Geol. Soc' on the Cretaceous Rocks, by Professor E. Forbes, 

 Messrs. Lonsdale, Rose, Austen, Cunnington, Morris, Weaver, Rose, Clarke, Bunbury, Bowerbank, 

 R. C. Taylor, Ibbetson, Toulmin Smith, D. Sharpe. The Manuals of Geology, by Sir H. De La Beche, 

 Sir Charles Lyell, and Professor Jukes ; and the " Geology of the Isle of Wight," by Mr. H. W. Bristow, 

 in the ' Memoirs of the Geological Survey.' The reader will likewise find most valuable information 

 in Le Vicomte D'Archiac's ' Histoire des Progres de la Geologie,' torn, iv and v, " Sur la Formation 

 Cretacee ;" the memoirs by M. E. Gueranger, in the 'Bull. Soc. Geol. de France;' M. Cornuel's 

 "Section of the Environs of Vassy " (' Mem. Soc. Geol. de France,' t. iv) ; M. Leymerie's " Memoir on 

 the Department of the Aube" ('Mem. Soc. Geol. de France,' t. ivand v) ; and in the different important 

 works by the late M. Alcide d'Orbigny. 



