INDEX. 



Aalen, 143, 179, 182, 183. 

 Aargau, 183, 191. 

 Aoanthoceras, 23, 33. 



angulicostatum, 33. 



mammillare, 23. 

 Acceleration, Law of, ix, x, 2, 19, 28, 40-45, 47, 78. 

 Achdorf, 168. 

 Acme, x, 21, 107, 112. 

 Acmic forms, 23, 28, 71. 



radicals, 23. 

 Adnet, or Adneth, 109, 111, 112, 125, 157, 167, 201. 

 Adnether-Schichten, 100. 

 Advantageous differences, 50. 

 iEgoceras Althii, Herb., 110. 



angulatum, Neum., 129, 134. 



angulatus, Wright, 130. 



Belcheri, Wright, 137, 141. 



Boucaultiana, Wright, 133. 



Buonarotti, Mojs., 7. 



catenatum, 134. 



catenatus, Wright, 129. 



centauroides, Can., 154. 



Charmassei, Wright, 132. 



Clausi, Neum., 122, 123. 



Cocchi, Can., 200. 



crebrispirale, Neum., 124. 



heterogeneum, Wright, 41. 



intermedium, Wright, 137, 141. 



Johnstoni, Neum., 137. 



Johnstoni, Wah., 137. 



laqueolus, Wright, 139. 



Liasicum, Wright, 139. 

 teri, Can., 154. 



Moreanus, Wright, 130. 



Naumanni, Neum., 124. 



planorbis, Wright, 121. 



planorboides, Giim., 89. 



planorboides, Neum., 89. 



Portisi, Can., 124. 



sagittarium, Tate & Blake, 201. 



sagittarium, Wright, 201. 



Slattevi, Wright, 201, 212, 213. 



Spezianum, Can., 136. 



striatum, Wright, 41. 



Struckmanni, Neum., 124. 



subangulare, Neum., 129. 



subangulare, Wah., 129. 



tenerum, Neum., 126. 



^Egoceras tortile, Wright, 139. 



torus, Neum., 137. 



trapezoidale, Can., 134. 

 Agassiceran Series, 65. 



Branch, 194. 

 Agassiceras, 30, 40, 54, 77, 82, 99, 100, 102, 106, 107, 



111, 114, 116, 194, 214. 

 Agassiceras laevigatum, 25, 65, 66, 67, 78, 99, 100, 

 101, 194, 195, 197, 200, 203. 



nodosaries, 66, 197, 199. 



Scipionianum, 66, 77, 78, 82, 83, 100, 101, 195, 

 197, 199, 200. 



Scipionis, 66, 78, 100, 115, 119, 199. 



striaries, 66, 67, 78, 82, 100, 101, 105, 115, 121, 

 196, 197, 198, 203, 214, 215, 216. 

 Agassiz, Alexander, vii, 86. 



Prof. Louis, vii. 

 Agoniatites, 25, 26. 

 Ain, 87. 



Aldainic Basins, 89, 117, 118. 

 Aldingen, 143. 

 Also Rakos, 95. 

 Amaltheidse, 50. 



Amaltheus, 48, 116 note, 188, 213. 

 Amaltheus actseonoides, 216 note. 



Greenoughi, Wright, 218. 



Guibalianus, Wright, 218. 



Hawskerense, 24, 188. 



Lymensis, Wright, 217. 



margaritatus, 216, 216 note. 



oxynotus, Wright, 215. 



Simpsoni, Simps., 217. 



AViltshirei, Wright, 217, 218. 

 Ambulatory pipe or hyponome, 29. 

 America, 87, 117. 

 Amherst, 114, 129. 

 Ammbnitinse, 2, 3, 5, 7, 13, 16, 1S-36, 39, 42, 48, 51, 



66, 85, 88, 91, 103, 114, 116, 118, 167, 195. 

 Ammonites, diseased forms, 32. 

 Ammonites Aballoense, Dum., 220. 



abnormis, Hauer, 100, 195. 



acutiangulatus, 109. 



acuticarinatus, Simps., 170. 



affinis, 102 note. 



altus, Dum., Ill, 112 note. 



angulatus, 92, 94. 



angulatus, Quenst., 130. 



angulatus, Schlot., 130. 



