EXPLANATION OF THE FIGURES. XI 



FlG. 



dendron pseudostylina ; c, Pentacrinus briareus ; cl, Pterocoma 



pinnata ; e, Cidaris ; /, Dysaster ; g, Nucleolites. 



164. Shells of the Cretaceous formation ; , Ammonites ; l t Crioceras ; c, 



Scaphites ; d, Ancyloceras ; e, Hamites ; f\ Baculites ; g, Turrilites. 



165. Shells of the Cretaceous formation : a, Magas ; b, Inoceramus ; c, Hip- 



purites ; d, Spondylus ; e, Pleurotomaria. 



166. Radiata from the Cretaceous formation : a, Diploctenium cordatum ; 



b, Marsupites ; d, Galerites ; c, Salenia ; e, Micraster cor-angninum. 



167. Nummulite. 



168. Supposed outline of Paleotherium. 



169. Supposed outline of Anoplotherium. 



170. Skeleton of the Mastodon, in the Cabinet of Dr. J. C. "Warren. 



