434 FIELD MUSEUM or NATURAL HISTORY ZOOLOGY, VOL. VII. 



Nematognathi 239 



Neomaenis argentiventris 140 



Neotoma * 15 



Nerita aurantia 218 



signata 218 



strigillata 218 



versicolor 218 



Neritina cornea 218 



petiti 218 



pulligera 219 



nero, Aulicus 364, 365 



nexus, Trichodes 371 



nicaraguense, Cichlasoma 129, 130 



Rhamdia 134 



nicaraguensis, Carcharhinus 103 



Eulamia 103 



Gambusia 113 



Heros 129 



Neetroplus 130 



Paragambusia 113 



Pimelodus 106 



Rhamdia 106 



nigrescens, Centropomus 140, 174 



Leuciscus 153, 154 



nigricans, Catostomus 257 



nigricolor, Cnemidophorus 417 



nigripennis, Argyrosomus 293 



Lebasiella 397 



Orthopleura 395 



nigritum, Cichlasoma 128 



nigriventris, Clerus 359 



nigro-aenea, Hydnocera 380 



nigrofasciatum, Cichlasoma. .141, 180, 



189 



nigrum, Boleosoma 324 



niloticus, Varanus 409 



nitidissima, Nanina 215 



nitidus, Adelphoclerus 357 



Chlorichthys 68 



niveatus, Microspathodon 63 



niveifascia, Hydnocera 376 



notata, Menidia 41 



Uma 3 



obcordata, Pistia 170 



obscura, Eulamia 29 



obtusirostris, Bosmina 204 



occipitalis, Chioractis 15 



ocellatus, Lycodontis 32 



ocellatus, Lycodontis Cont'd. 



Platophrys 86 



oculata, Cregya 386, 389, 390, 391 



oculatum, Enoplium 389 



Pelonium 389 



oculatus, Clerus 389 



Ocyurus chrysurus 57 



cerstedii, Astyanax 145 



Ogilbia cayorum 85 



oglinum, Opisthonema 33 



oithnoides, Cyclops 205 



olivaris, Leptops 244 



onusta, Chariessa pilosa var 394 



Ophichthyidas 31 



Ophichthys triserialis 31 



opifex, Clerus 360 



Opisthonema libertatis 112 



oglinum 33 



Opsopceodus 263 



emiliae 264 



orcutti, Sceloporus 1 1 



Orcynus alliteratus 46 



thynnus 46 



oresterus, Trichodes 368, 369 



ornaticollis, Cleronomous 362 



ornatus, Glerus decussatus var 361 



Trichodes 372, 373, 374, 375 



Orthagoriscus mola 80 



Orthopleura 393 



bimaculata 395 



damicornis 394, 395 



nigripennis 395 



punctatissima 395 



quadraticollis 393 



texana 394, 395 



Orthopristis chrysopterus 58 



oryhynchus, Rhamphiophia 405 



osseus, Lepisosteus 153, 237 



Ostraciidae 79 



Oxybelis acuminatus 416 



Oxyechus vociferus 196 



pachycephalus, Fundulus 136 



pagodula, Vivipara 221 



Palaemondiae 202 



pallida, Cymatodera 344 



pallidus, Lepomis 156, 175 



pallipes, Corynetes 397 



Lebasiella 396 



