INDEX. 



Acadian Group, 79. 



Acer, 308. 



Aeervularia, 119, 173. 



Acidaspi-s, 123. 



Acorn-shells, 267. 



Acroculia. 128. 



Acrodws, 214, 242, 275; nobilis, 242. 



Acrotreta, 110 



Acroura, 120. 



Actinocrinu-s, 175. 



^■Eglina, 108. 



jEpiornis, 348. 



Agnostus, 85-87, 108 ; c^a;, 85. 



ul^es malchis, 354. 



Alecto, 108. 



Alethopteris, 136, 165, 196. 



.4?5roE(6-e6 Sea-weeds). 



Alligators, 218, 297. 



^4??iiis, 262. 



Amhlypterus, 188; macropterus, 188. 



Ambonychia, 111. 



Ammonites, 187, 212-214, 237-239. 272; 

 Humphresiaiius, 238 ; bifroyiK. 'SSi. 



Amriwaitidce, 239, 272, 285, 294. 



Amphibia, 189; of the Carboniferous, 

 189-191 ; of the Permian, 200 ; of the 

 Trias. 215-217; of the Jurassic, 242; of 

 the Miocene, 313. 



Amphicyon, 322. 



J mphilestes, 253. 



Amphispongia, 118. 



Amphistegina, 311. 



AmphitJierium, 253 255; Prevostii, 254. 



Amphitragulus, 317. 



^77ip?6xw^, 173 ; coralloid-es, 174. 



Ampyx, 108. 



Ananchytes, 266. 



Anchitherium, 301, 302. 



Ancyloceras, 272, 273; MatTieroniunus, 

 273. 



Ancylotherium Pentelici, 315. 



J. /ufr ("«.>■ Scheuchzeri, 313, 314. 



Aiigiosperm-s, 261, 262. 



Animal Kin|;dom, divisions of, 375-378. 



^«woj>i<s, 206. 



J.7inelida, of the Cambrian period, 82, 

 83; of the Lower Silurian, 107; of the 

 Upper Silurian, 122, 123 ; of the De- 

 vonian, 143, 144 ; of the Carboniferous, 

 178. 



Annularia, 137, 196, 207. 



Anomodojitia, 220. 



Anoplotlierid/s, 302. 



A'lioplotherium, 302, 303 ; commune, 303. 



Ant-eaters, 299, 315, 349, 350, 353. 



Antelopes, 317. 



Anthra^osaurus Russelli, 190. 



Anthrapalcemon gracilis, 180. 



Antilocapra, 318. 



Antilope quadricornis, 318. 



Antwerp Crag, 325. 



Apes, 323. 



Apiocrinus, 231. 



Apteryx, 346, 348. 



Aqueous rocks, 15. 



Arachnida of the Coal-measures, 181. 



Aralo-Caspian Beds, 326. 



Araucaria, 262. 



Aro/ucarioxylon, 170. 



J.rca, 198 ; antiqua, 199. 



Archceocidaris, 178. 



Archceocyathus, 82. 



Archceopteryx, 252, 281; macrura, 252, 



253. 

 Arcnceosphcerince, 75. 

 Archimedes, 184; Wortheni, 183. 

 J rchiulus, 182. 



Arctic regions, Miocene flora of, 310. 

 Arctocyon, 304. 

 Arenaceous rocks, 20. 

 Arenicolites, 83 ; didymus, 88. 

 Arenig rocks, 92, 94. 

 Argillaceous rocks, 20. 

 Armadillos, 299, 351, 353. 

 Artiodactyle Ungulates, 300, 317. 

 Asaphus, 108 ; tyrannus, 107, 108. 

 Ascoceras, 130. 

 Aspidella, 76. 

 Aspidura loricata, 210. 

 Astarte horeaiis, 338. 

 AsterophyUites, 137, 196. 

 Asterosteus, 152. 

 Astrceidce. 231. 



Astrceospongia, 118, 139. (_ 



Astylospongia, 98 ; prcemorsa, 98. 

 Athyris, 110, 127, 147, 198 ; subtilita, 185. 

 Atlantic Ooze, 22, 23. 

 Atrypa, 127; congesta, 127; hemisphce' 



rica, 127 ; reticularis, 147, 148. 

 Auger-shells, 293. 

 Aurochs, 356. 

 Aves (see Birds). 



