INDEX. 



Acadian Group, 79. 



Acer, 320. 



Acervularia, 121,176. 



Acidaspis, 126. 



Acorn-shells, 275. 



Acroculia, 130. 



Acrodus, 220, 249, 283; nobilis, 249. 



Acrotreta, 112. 



Acroura, 122. 



Actinocrinus, 178. 



JEglina, 110. 



jEpiornis, 361. 



Agnostus, 85-87, 109; rex, 85. 



^tees malchis, 368. 



Alecto, 110. 



Alethopteris, 138, 167, 200. 



JUoa? (see Sea-weeds). 



Alligators, 224, 307. 



^Ifotts, 270. 



Amblypterus, 192 ; macropterus, 192. 



Ambonychia, 112. 



Ammonites, 191, 218-220, 244-246, 280; 

 Humphresianus, 245; bifrons, 245. 



Ammonitidse, 246,280,294, 304. 



Amphibia, 193; of the Carboniferous, 

 193-195; of the Permian, 204; of the 

 Trias, 221-223 ; of the Jurassic, 249 ; 

 of the Miocene, 324. 



Amphicyon, 333. 



Amphilestes, 261. 



Amphispongia, 120. 



Amphistegina, 322. 



Amphitherium, 261, 262; Prevostii. 261. 



Amphitragulus, 328. 



Amplexus, 177; coralloidcs, 178. 



Ampyx, 110. 



Ananchytes, 275. 



Anchitherium, 311, 312. 



Ancyloceras, 280, 281 ; Matheronianus, 

 281. 



Ancylotherium Pentelici, 32R. 



AndriasScheuchzeri, 324,325. 



Anglosperms,269, 271. 



Animal Kingdom, divisions of, 389- 

 392. 



Anisopus, 211. 



Annelida, of the Cambrian period, 

 82, 84 ; of theJLower Silurian 109 ; of 

 the Upper Silurian, 124, 125; of the 

 Devonian, 146, 147; of the Carbon- 

 iferous, 181. 



Annularia, 139, 200, 212. 



Anomodontia, 226. 



Anoplotheridse, 313. 



Anoplotherium, 313 ; commune, 313. 



Ant-eaters, 309, 326, 363, 364, 366. 



Antelopes, 328. 



Anthracosaurus, Russelli, 194. 



Ahthrapalsemon gracilis, 184. 



Antilocapra, 330. 



Antilope quadricornis, 320. 



Antwerp Crag, 336. 



Apes, 334. 



Apfocrinus, 238. 



^pZeryz, 359, 361. 



Aqueous rocks, 15. 



Arachnida of the Coal-measures, 185. 



Aralo-Caspian Beds, 337. 



^4mttcaria, 270. 



Araucarioxylon, 173. 



^4rra, 203; antiqua, 203. 



Archasocidaris, 182. 



Archaeocyathus , 82. 



Archasop'teryx, 260, 290; wacrwra,259 



260. 



Archasosphserinse, 75. 

 Archimedes. 187; Wortheni, 187. 

 Arhciulus, 185. 



Arctic regions, Miocene flora of, 321. 

 Arctocyon, 315. 

 Arenaceous rocks, 21. 

 Arenicolites, 83; didymus, 88. 

 Arenig rocks, 93, 95. 

 Argillaceous rocks, 21. 

 Armadillos, 309,863, 366. 

 Artiodoctyle Ungulates, 313, 328. 

 Asaphus, 110 ; tyranmis, 108, 110. 

 ^4scoceras, 132. 

 Aspidella, 76. 



Aspidura loricata. 215. , 



Astarte borealis, 351. 

 Asterophyllites, 139, 200. 

 Asterosteus, 153. 

 ^4s<rid, 238. 

 Astrssospongia, 120, 141. 

 Astylospongia, 99; prsemorsa, 99. 

 Athyris, 112, 130, 149,202; stt&tfZfta,189. 

 Atlantic Ooze, 23, 24. 

 Atrypa, 130: congesta, 129; hemisphae- 



rica, 130 ; reticularis, 149, 150. 

 Auger-shells, 303. 

 Aurochs, 370. 



(416) 



