488 
INDEX 
Nelsonia, 201 
Nemorrhaedus, 83, 106 
Nenia (see Clausilia). 
Neocyclotus, 268 
Neofiber, 64, 182 
Neomylodcm (see Grypotherium). 
Neotomodon, 201 
Nephila, clavipes, 190 ; clavata, 191 
Nesodon, 399 
Nesolagus, 225 
Nesomimus, 301, 315 
Nesopelia, 301 
Nesoryzomys, indefessus, 299 ; nar- 
boroughi, 299 
Nesospiza, 393 
Neuroptera of Florida, 178 ; of Cen¬ 
tral America, 258 ; of Antilles, 289 
Neiirotrichus, .321 ; gibbsi, 201 
Newfoundland, survival of fauna from 
pre-glacial times, 41 ; geological 
history, 55 ; fauna of, 56 
Newportia, 350 
Newton, Falkland island fossils, 430 
Nicaragua, Lake, fauna of, 240 
Nicoletiella, 258 
Nome, marine gravels at, 97 
Nonionina depressula, 47 
North-Eastern States, reptiles, 123— 
135 ; amphibians, 135—139 ; flora, 
139—141 ; mammals, 141—143 
Nordenskiold, on Mastodons, 408 
Notiodrilus, 412 ; bovei, 431 ; falc- 
landicus, 431 
Notiosorex, 201 
Notostylops, 400—402 
Notropis, cornutos, 50 ; atherinoides, 
50 
Nova Scotia, land-bird fauna, 56 
Nycterinus, 215 
Nysius, 391 
O 
Ocean floor, composition of, between 
America and Galapagos, 332 
Oceanodroma cryptoleucura, 302 
OchotoTui. collaris, 92 
Octodontidae, 371 
Odocoilens, origin of, 107—110, 396; 
hemionus, 107 ; virginianus, 108, 
396 ; columbwnus, 108, avius, 109 
Odonata, 258 
Oeneis semidea, 36, 38 
Oleacinae, 272 
“Olm,” 136 
Oniscus asellus, 39 
Oniticellus, 215 
Onychodectes, 244 
Onychomys, 201 
Onychophora, 345—347, 432 
Opeas, 380, 385, 393 
Ophisaurus, distribution of, 281 ; ven- 
tralis, 173, 221 ; apus, 173, 221 
Opisthacanthus, 382 
Opisthopatus, 346, 432 
Opossum, range, 182 ; past history, 
229 ; in West Indies, 283 ; in South 
America, 366 ; in Santa Cruz beds, 
403 
Oppenheim, on Eelicidae, 206 
Oreamnos, origin of, 106 ; kennedyi, 
92 ; montanus, 105 
Oreohelix, 206 
Oreotrochilus, 367 
Orestias, 361, 362 
Orthalicinae, 270, 273 
Ortmann, distribution of Cambarus, 
177 ; distribution of freshwater 
crayfishes, 217—220; Central Ameri¬ 
can crabs, 239, 240 ; freshwater 
crabs, 255 ; land - bridge between 
Mexico and Cuba, 291 ; development 
of Central America and Antilles., 
292 ; origin of Galapagos, 314 ; 
Miocene marine fauna of Peru, 334; 
geological history of South America, 
339, 340 ; south Atlantic land- 
bridge, 381—383; on Ihering’s Arcb- 
belenis, 382 ; on age of Santa Cruz 
beds, 398 ; Chilean crayfishes, 405 ; 
on Antarctic continent, 419, 420, 424 
Orycteropidae, 373 
Orycteropus, 372 
Oryctolagus cuniculus, 225 
Oryzomys, range of, 284 ; victis, 284; 
antillarum, 284; galapagoensis, 299; 
bcLuri, 299 ; nelsoni, 299 
Osborn, connection between North and 
and South America in Cretaceous 
times, 71, 227 ; connection between 
Asia and North America, 84, 319 ; 
dispersal of camels, 86 ; distribu- 
