INDEX. 



Acrodus, a genus of fossil sharks, i. 



220. 

 Actinocrinites, 30-dactyles, Miller's 



restoration of, i. 323. 

 Adapts, character and place of, i. 



71. 

 Agassiz, his recognition of the scales 

 of fishes in coprolites, i. 150; on 

 causes of the death of fishes, i. 

 100; on origin of cololites, i. 

 156; on Glaris turtle, i, 196; his 

 classification of fishes, i. 204; do- 

 cuments consigned to him by 

 Cuvier, i. 204; his new orders of 

 fishes, i. 205, 206; geological re- 

 sults established by, i. 208; his 

 new arrangement of Monte Bolca 

 fishes, i. 217; his discovery of 

 belemniles with ink-bags, i. 282; 

 on the bilateral structure of ra- 

 diated animals, i. 313. 

 Agnostus, a t^enus of trilobites, i. 



'295. 

 Aichstadt, pterodactyles found at, i. 



171. 

 Aix, fossil fishes of, i. 217. 

 Allan, Mr., his paper on Antrim 



belemnites, i. 285. 

 Amber, fossil resin from lignite, i. 



390. 

 Amblvpterus, fossil genus of fishes, 



i. 212. 

 Ammonites, formed by cephalopo- 

 dous mollusks, i. 252; character- 

 istic of different formations, i. 

 252; geological distribution of, i. 

 253; geographical ditto, i. 254; 

 extent and number of species, i. 

 253; size of, i. 253; sub genera 

 of, i. 253; shell composed of 

 three parts, i. 254; external 

 shells, i. 255, 256; outer cham- 

 ber contained the animal, i. 256 ; 

 double functions of shell, i. 256 ; 

 contrivances to strengthen shells, 

 i. 357 — 359 ; ribs architectural 

 disposition of, i. 258 ; transverse 

 plates, use of their foliated edges, 



i. 261 — 264; compound internal 

 arches, i. 264; siphuncle, organ 

 of hydraulic adjustment, i. 265 ; 

 siphuncle, occasional state of 

 preservation, i. 266 ; siphuncle, 

 placed differently from that of 

 nautili, i. 267; siphuncle, Dr. 

 Prout's analysis of, i. 266; air- 

 chambers, more complex in am- 

 monites than in nautili, i. 264; 

 ammonites, how different from 

 nautili, 267 ; Von Buch's theory 

 of, i. 266 ; uses of lobes and sad- 

 dles in, i. 268; concluding obser- 

 vations upon, i. 268, 269 ; proba- 

 ble place of heart in, ii. 58. 

 Anarrhicas, palatal teeth of, i. 214. 

 Animals, final cause of their crea- 

 tion, i. 85 ; lower classes of, pre- 

 dominate in earlier strata, i. 95 ; 

 extinct races, how connected 

 with existing species, i. 433; 

 causes of their sudden destruc- 

 tion, i. 100; small number adapt- 

 ed for domestication, i. 85; ter- 

 restrial, how buried in strata of 

 freshwater and marine formation, 

 i. 104. 

 Animal enjoyment, one great object 



of creation, i. 223, 229. 

 Animal kingdom, four great divi- 

 sions of, coeval, i. 56 ; early re- 

 lations of, i. 74. 

 Animal life, extent of upon our 

 globe, i. 86; progressive stages 

 of, i. 95 ; remains of in secondary 

 strata, i. 63. 

 Animal remains, most instructive 

 evidences in geology, i. 105 ; 

 preserved chiefly by agency of 

 water, i. 103. 

 Annelidans, fossil remains of, i. 292. 

 Anning, Miss, her discovery of ink- 

 bag within horny sheath of Be- 

 lemnite, i. 282; her discoveries 

 at Lyme Regis, passim; her ob- 

 servations on connexion of lignite 

 with pentacrinites near Lyme, i. 



