INDEX. 
Aalen, 143, 179, 182, 188. 
Aargau, 183, 191. 
Acanthoceras, 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. 
Hgoceras 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, 159. 
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. 
Slatteri, Wright, 201, 212, 213. 
Spezianum, Can., 136. 
striatum, Wright, 41. 
Struckmanni, Neum., 124. 
subangulare, Neum., 129. 
subangulare, Wah., 129. 
tenerum, Neum., 126. 
ZEgoceras 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 levigatum, 25, 65, 66, 67, 78, 99, 100 
101, 194, 195, 197, 200, 208. 
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. 
Amaltheide, 50. 
Amaltheus, 48, 116 note, 188, 213. 
Amaltheus acteonoides, 216 note. 
Greenoughi, Wright, 218, 
Guibalianus, Wright, 218. 
Hawskerense, 24, 188. 
Lymensis, Wright, 217. 
margaritatus, 216, 216 note. 
oxynotus, Wright, 215. 
Simpsoni, Simps., 217. 
Wiltshirei, Wright, 217, 218. 
Ambulatory pipe or hyponome, 29. 
America, 87, 117. 
Amherst, 114, 129. 
Ammonitine, 2, 3, 5, 7, 18, 16, 18-36, 39, 42, 48, 51, 
66, 85, 88, 91, 103, 114, 116, 118, 167, 195. 
Ammonites, diseased forms, 82. 
Ammonites Aballoense, Dum., 220. 
abnormis, Hauer, 100, 195. 
acutiangulatus, 109. 
acuticarinatus, Simps., 170. 
affinis, 102 note. 
altus, Dum., 111, 112 note. 
angulatus, 92, 94. 
angulatus, Quenst., 150. 
angulatus, Schlot., 130, 
’ 
