INDEX OF SUBJECTS 



ACANTHODES MlTCHELLI, 197 



Wardi, 197 

 Acephala, 48 

 Acerotherium incisivum, 152 



tetradactylum, 152 



Achatinella, confined to Sand- 

 wich Islands, 64, 126, 137, 

 271 



Acmcea, persistent form of 



Gastropod, 164, 194 

 Acotherulum, 154 

 Acranian Vertebrates, 51 



Haeckel's stage, 55 



Acrodus (Secondary Shark), 169 

 Actceonina, 164 

 Adapis, 7 

 Aetosaurus, 300 

 Agassiceras, 261 

 Ages of the Earth, Plate I 

 Agnostus, 95, 324, 327 

 Alcyonaries (Corals), 326 

 Allotherian Marsupials, 304 

 Alveolines (Foraminifera), 227 

 AmalthecB, 286 

 Amblypods, 174, 308 

 Amblyrhiza (Rodent), 316 

 Ambulacra (of Sea Urchins), 



117. 2 S6 

 AmiadcB (Ganoid fishes), 170 



series of similar species, 112 

 Ammonites and Nautilidae, 228 



Branco on, 257-9 



d'Orbigny on, 21 ' 



Evolution of, 213 



Extinction of, 267 



Fontannes on, 141 



giant forms of, near period 

 of extinction, 236 



Ammonites and Nautilidae 



greater or less complication 

 of lines of suture, 150 



Hyatt on evolution of shells, 

 241 



Kilian on, 229 



Neumayr on, 157 



Researches on Goniatite 

 stage of, 117 



Sayn on, 161 



Shells as bearing on general 

 evolution, 257-61 



Uncoiling of shell of, 214 



Waagen on mutations of, 156 



(Phylloceras), 69, 157 



subradiatus, 67, 156 

 Amnion, the, 51 

 Amoeba, 45 



Amceba stage of Haeckel, 54 

 Amphibians go back as far as 

 Devonian period, 252 



Lamarck on, 31 



Palaeozoic, 198, 255 



Permo-carboniferous, 94 

 Amphibolites, 332 

 Amphicyon, 105, 317 

 Amphioxus, Cope on, 85 



Darwin on, 41 



Haeckel on, 55 



Kowalevsky, on 50 

 Amphisbaenas, 223 

 Amussia, 164 

 Anatifa, 37, 217 



A nchisauridce , 300 

 Anchitherium, 72, 104, 313 

 Ancodus, 176, 313 

 Ancyloceras Ammonite, 196, 

 215 



339 



