542 PRIMARY FACTORS OF ORGANIC EVOLUTION. 



Mya arenaria, 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. 

 Neanderthal man, 159, 161, 163, 165, 



169, 176. 

 Necturus, 113. 

 Negritos, 163, 166, 169, 154. 

 Negro, 159, 163. 



Nematocarpa filamentaria, 526. 

 Nematognathi, 106. 

 Neocaledonians, 163. 

 Neocene, 143, 148. 

 Neo-Darwinians, 381. 

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



518. 



Neo-Lamarckism, 241, 518. 

 Neolithic man, 166. 

 Neothyris, 178. 

 Nephryticeras, 415. 

 Neurism, 484, 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 kmetogenesis, 375 ; to the doc- 

 trine of parallelism, 205. 



Obolella, 176. 



Odessa, 224. 



(Ecology, v, 384. 



CEstridae, 102. 



Oliva, 260. 



Olivella, 260. 



Ononis repens, 227 ; O. spinosa, 227 

 228. 



Ontogeny, 444. 



Oophyta, 77. 



Opheomorphus mz'mus, 29. 



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



Ophidioceras, 414. 



Opinions of Neo-Lamarckians, 518. 



Opisthobranchs, 261. 



Opisthotome mastication, 318. 



Orbiculoidea, 177. 



Orconectes 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 Glires, 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, n. 



Ornithosauria, 114, 120, 121. 



Ornithostomi, 143. 



Orr, H. B., 531. 



Orthagoriscidae, 108. 



Orthal mastication, 318. 



Orthoceras, 185, 187, 408. 



Orthognathism, 248. 



Orthoptera, 203. 



Ortyx virginianus, 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 

 nea, 30, 37, 39 ; O. d. collar is, 31, 33, 

 39 ; O. d. conjunct a, 30, 39 ; O. d. 

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

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

 35,39; O. d. polyzona, 30, 37, 39; O. 

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

 tis, 31, 33. 39; O.d. triangula, 31, 



33, 39- 



Osteocephalus, 198, 199. 

 Osteolepididae, 91. 





