Ammonites Sampsoni, Portl., 121, 122 note. 
Sauzeanus, D’Orb., 184. 
Scipionianus, D’Orb., 197. 
Scipionianus, Quenst., 197. 
Scipionianus olifex, Quenst., 199. 
Scipionis, Rey., 199. 
Scylla, Rey., 141, 142. 
semicostatus, Simp., 165. 
semicostatus, Y. & B., 165 note. 
Simpsoni, Wright, 217. 
sinemuriensis, D’Orb., 191. 
sinemuriensis, Fraas, 149. 
sinemuriensis, Queust., 191, 192. 
sironotus, Quenst., 139. 
Smithi, Quenst., 201. 
Smithi, Sow., 201. 
solarium, Quenst., 191, 192. 
spinaries, Quenst., 184. 
spiratissimus, Hauer, 109, 141, 142, 143. 
spiratissimus, Quenst., 156. 
stellaris, 109, 202. 
stellaris, Coll., 100. 
stellaris, Hauer, 201, 202. 
stellaris, Sow., 68, 206. 
stellaris, Ziet., 206. 
striaries, Quenst., 196. 
subangularis, Opp., 126. 
subarietinus, Menegh., 166. 
subplanicosta, 105. 
Suessi, Hauer, 174. 
tenellus, Simps., 211. 
tortilis, Coll., 91,137. 
tortilis, D’Orb., 137. 
torus, D’Orb., 137, 1438. 
trachyostraca, Mojsis., 3, 6. 
Turneri, Opp., 208, 209. 
Turneri, Quenst., 169, 201, 208. 
Turneri, Sow., 208, 210. 
Turneri, Ziet., 201, 202, 204. 
(Scaphites) umbilicus, 34, 
undaries, Quenst., 208. 
victoris, Dum., 219. _ 
vertebralis, Sow., 32. 
Youngi, Simps., 170. 
zithus, 109. 
Ammonoids, ix, 2, 3, 5, 9-19, 22, 25, 26, 31, 85-87, 39, 
44, 48-54, 80, 85, 117, 118. 
Anachronic species, 110, 111 note. 
Analdainic Basins, 89. 
Faunas, 89, 111, 117, 118. 
Analogies, 25. 
Analogy, mimetic, 27. 
Anarcestes, 1-4, 15, 17, 18, 22, 66. 
Anarcestes fecundus, 1. 
subnautilinus, 2. 
Anaplasis, x, 20, 30. 
Anaplastic mode of development, 38, 39. 
Anaplastology, 21. 
Anagenesis, Laws of, 71, 74, 76, 77. 
Ancyloceras, 29, 32. 
INDEX. 
Androgynoceras hybridum, 41. 
Henleyi, 41. 
Annular muscle, 50. 
Angulatus Zone and Bed, 89, 92, 98, 95-98, 101, 108, 
104, 106-111, 114-116, 119, 128, 141, 149, 154, 
155, 165, 172, 1:5, 158: 
Angustisellati, 3, 17. 
Arcestes, 5, 111. 
Arcestes priscus, Waag., 4 note. 
Arcestineg, 3, 4, 5, 7, 48. 
Arcy sur Cure, 91. 
Ardéche, 87. 
Argonauta, 26. 
Argentine Republic, 87. 
Avietenkalk, 157, 167, 171, 187. 
Arietids, xi, 5, 6, 7, 22, 24 note, 25, 80, 88, 34-37, 
54-57, 67, 69, 83, 87, 89, 91, 98, 101, 105, 108, 
110-118, 117-119, 121, 124, 180, 186, 156, 178, 
184, 196, 200, 211, 214. 
Arietide, Genera of, 85, 87, 102, 105, 108, 110, 112. 
Arietites, 22, 60, 151. 
Arietites abjectus, 161. 
ambiguus, 174. 
bisuleatum, 186. 
bisuleatus, Wright, 179. 
Bonnardi, Wright, 157. 
Brooki, Wright, 206, 210. 
Bucklandi, 188, 
Campigliensis, 154 note. 
Castagnolai, Can., 216 note. 
Collenoti, Wright, 211. 
Conybeari, 95, 166, 167. 
Conybeari, Herbich, 95, 157. 
Conybeari, Wright, 157. 
Crossi, 182, 184. 
Crossi, Wright, 188. 
denotatus, Wright, 211. 
difformis, Blake, 169. 
discretus, 154 note. 
dorsicus, 161. 
impendens, Quenst., 211. 
impendens, Wright, 211. 
levis, Geyer, 125. 
Liasicus, Wih., 139. 
ligusticus, 154 note. 
Macdonelli, Tate & Blake, 164, 
multicostatus, 95, 194. 
multicostatus, Herbich, 95, 157. 
Nodotianus, Wright, 162, 164. 
obtusus, 115, 151. 
obtusus, Wright, 201. 
raricostatus, Wright, 144, 145, 
rotiformis, 115, 188. 
rotiformis, Wright, 176, 186, 188, 197. 
Sauzeanus, Wright, 186. 
Scipionianus, Wright, 197. 
Seylla, Rey., 142. 
Seylla, Wah., 141, 142. 
semicostatus, Wright, 165, 169. 
semilevis, 174. 
