542 PRIMARY FACTORS OF ORGANIC EVOLUTION. 



Mya arcnaria, 263, 265, 266. 

 Mycetozoa, 219, 229. 

 Myism, 484. 

 Myrmecobius, 140. 

 Myxomycetes, 75. 219, 501, 503. 



Nageli, 527, 528. 



Narwhale, 330. 



Natica, 213. 



Natural selection, 247, 385, 474. 



Nature of variations, 113, 115. 



Naulette, 161, 162, 163, 165. 



Nautili, 183, 184, 185, 186, 408, 413, 417, 



418, 419, 420, 421, 422. 

 Nautilinidae, 421. 

 Nautiloids, 405, 415, 421. 

 Nea>nderthal man, 159, 161, 163, 165, 



169, 176. 

 Necturus, 113. 

 Negritos, 163, 166, 169, 154. 

 Negro, 159, 163. 



Nematocarpa filamentariay 526. 

 Nematognathi, 106. 

 Neocaledonians, 163. 

 Neocene, 143, 148. 

 Neo-Darwinians, 381. 

 Neo-Lamarckians, 255, 284, 375, 389, 

 . 518. 



Neo- Lamarck ism, 241, 518. 

 Neolithic man, 166. 

 Neothyris, 178. 

 Nephryticeras, 415. 

 Neurism, 4S4, 496. 

 Neuroptera, 203. 

 New Britain, 169. 

 New England, 49, 52, 56, 437. 

 New Granada, 29. 

 Newton, 480. 

 New York, 50, 402, 437. 

 Nigritos, 154, 163, 166, 169. 

 Normal articulations, 283. 

 Norman horse, 423. 

 North America, 10, 29, 47, 48, 53, 55, 



73, 115. 124. 

 Nutrition, 423. 



Objections, to the doctrine of inheri- 

 tance of acquired characters, 458 ; 

 to kinetogenesis, 375 ; to the doc- 

 trine of parallelism, 205. 



Obolella, 176. 



Odessa, 224. 



CEcology, V, 384. 



CEstridae, 102. 



Oliva, 260. 



Olivella, 260. 



Ononis repens, 227 ; O. spinosa^ 227 

 228. 



Ontogeny, 444. 



OOphyta, 77. 



Opkeotnorpktts mitnus, 29. 



Ophidia, 116, 120, 122, 218, 372. 



Ophidioceras, 414. 



Opinions of Neo-Lamarckians, 518. 



Opisthobrancbs, 261. 



Opisthotome mastication, 318. 



Orbiculoidea, 177. 



Orconecies pellucidus, 241, 



Ordovician, 77, 83, 176. 



Origin, of the animal line, 514; of 

 Batrachia, 89; of canine teeth, 327; 

 of carnivorous dentition, 332; of the 

 dental type of the Glirea, 345; of 

 divisions of the vertebrates, 362 ; of 

 genera, 9; of the plaits in the col- 

 umnella of the gastropods, 255 ; of 

 plants, 514; and survival of the fit- 

 test, 4; of hereditary individual 

 variation, 11. 



Ornithosauria, 114, 120, 121. 



(Drnithostomi, 143. 



Orr, H. B., 531. 



Orthagoriscidae, 108. 



Orthal mastication, 318. 



Orthoceras, 185, 187, 408. 



Orthognathism, 248. 



Orthoptera, 203. 



Ortyx vzrginzanus, 52. 



Osborn, H. F., 152, 320, 324, 337. 378, 

 379. 444. 470, 520, 521, 530. 



Osceola doliata annulata, 30, 35, 39; 

 O. d. clerica, 31, 33, 39; O. d. cocci 

 neuy 30, 37,39 ; O. d. collaris, 31, 33, 

 39 ; O. d. conj'uncta, 30, 39 ; O. d. 

 doliata^ 22, 29, 30, 33, 39 ; O. d. gcn- 

 tilis, 30, 37, 39 ; O. d. parallela, 30, 

 35i 39; ^' d, poly zona, 30, 37, 39; O. 

 d. syspila, 30, 35, 39 ; O. d. teinpora- 

 liSy 31, 33, 39; O. d. triangula^ 31, 

 33. 39- 



Osteocephalus, 198, 199. 



Osteolepididae, gi. 



