LIST OF ILLUSTRATIONS. 



xvii 



H3. Trigonocarpum Ova- 

 turn 173 



114. Microscopic section of 



Foraminiferal lime- 

 stone Carboniferous, 

 North America 175 



115. Fusulina cylindrica. . . 176 



116. Group of Carbonifer- 



ous Corals 178 



117. Platycrinus triconta- 



dactylus 179 



118. Pentremites pyrif or- 



mis and P. conoideus 180 



119. Archceocidaris ellipti- 



cus.... 181 



120. Spirorbis Carbonar- 



ius...... 182 



121. Prestwichia rotund- 



data 183 



122. Group of Carbonifer- 



ous Crustaceans 184 



123. Cyclophthalmus senior 185 



124. Xylobius sigillaria . . . 186 



125. Haplophlebium Barn- 



esi 186 



126. Group of Carbonifer- 



ous Polyzoa 187 



127. Group of Carbonifer- 



ous Brachiopoda. . . . 189 



128. Pupa vetusta 190 



129. Goniatites Fossa 191 



130. Amblypterus macrop- 



terus 192 



131. Cochliodus contortus. 193 



132. Anthracosaurus Rus- 



selli 194 



133. Generalized section of 



the Permian rocks . . 199 



134. Walchia pinif ormis. . . 200 



135. Group of Permian 



Brachiopods 202 



136. Area antiqua 203 



137. Platysomus gibbosus 203 



138. Protorosaurus Speneri 205 



139. Generalized section of 



the Triassic rocks... 211 



140. Zamia spiralis 213 



141. Triassic Conifers and 



Cycads 214 



142. Encrinus liliif ormis. .. 215 



143. Aspidura loricata 215 



144. Group of Triassic Bi- 



valves 2j6 



145. Ceratites nodosus.... 218 



146. Tooth of Ceratodus 



seratus and C. altus 220 



147. Ceratodus Fosteri. . . . 221 



148. Footprints of Cheiro- 



therium 222 



149. Section of tooth of 



Labyrinthodont 223 



150. Skull of Mastodon- 



saurus 223 



151. Skull of Rhynchosau- 



rus 224 



152. Belodon, Nothosaurus, 



Palceosaurus, etc., . . . 225 



153. Placodus gig as 226 



154. Skulls of Dicynodon 



and Oudenodon. . . . 227 



155. Supposed footprint of 



Bird, from the Trias 



of Connecticut 228 



156. Lower jaw of Droma- 



therium sylvestre . ^ . . 229 



157. Molar tooth of Micro- 



lestes antiquus 229 



158. Myrmecobius fasci- 



atus 230 



159. Generalized section of 



the Juriassic rocks . . 236 



160. Mantellia megaloph- 



ylla 237 



161. Thecosmilia annularis 238 



162. Pentacrinus fasciculo- 



sus 239 



163. Hemicidaris crenula- 



ris 240 



164. Eryon arctiformis 241 



165. Group of Jurassic 



Brachiopods 242 



166. Ostrea Marshii 243 



167. Gryphcea incurva 243 



168. Diceras arietina 243 



169. Nerinaa Goodhallii... 244 



170. Ammonites Humph- 



resianus 245 



171. Ammonites bifrons... 245 



172. Beloteuthis subcostata 247 



173. Belemnite restored; 



diagram of Belem- 

 nite ; Belemnites can- 

 aliculata 248 



174. Tetragonolepsis 248 



175. Acrodus nobilis 249 



176. Ichthyosaurus com- 



munis 249 



