570 



MEMOIRS OF THE CARNEGIE MUSEUM 



nasutus, Acestrorhynchus, 43, 70, SI, 114, 407, 411 



nattereri, Pygoccntrus, 09 



Nebris, 465; microps, 72, S3, 470, 471 



nebulosus, Apionichthys, 527; Cestreus, 4G0 



Nematognathi, 118, 119 



nematophorus, Platystacus, 64 



Neoplecostomus granosus, 67, 229 



Netuma dubia, 140; grandicassis, 143; herzbergii, 



139; proops, 136; quadriscutis, 138; stricticassis, 



144 

 niger, Centrarchus, 20; Doras, 17, 24; Oxydoras, 17, 



24, 65, 76, 92, 189, 190; Pseudodoras, 189; Pygo- 



centrus, 19, 26, 69, 81, 383, 384; Rhinodoras, 189, 



190; Serrasalmo, 19, 384 

 nigrescens, Pseudancistrus, 54, 66, 77, 91, 92, 96, 



114,233,234 

 nigricans, Pacu, 25; Prochilodus, 270; Pygocentrus, 



26; Serrasalmo, 384; Trichomycterus, 211 

 nigro-maculata, Cychla, 20, 509, 510 

 nigrota!niatus, Chalceus, 18, 301 ; Leporinus, 18, 25, 



68, 79, 88, 96, 300, 301 

 nitida, Avicenna, 6 

 nodosus, Arius, 201 ; Auchenipterus, 201 ; Felichthys, 



200, 201 ; Pseudauchenipterus, 24, 65, 77, 200, 201 ; 



Silurus, 201 

 Notarius, 129; grandirassis, 64, 75, 110, 142, 143; 



parmocassis, 64, 75, 142, 144, 145; stricticassis, 



75, 110, 142, 144, 145 

 notata, Anisitsia, 19, 25, 67, 78, 88, 96, 277; Rham- 



della, 65 

 notatus, Anodus, 19, 277; Centrarchus, 20, 497; 



Hemiodus, 277; Passer, 526; Pimelodus, 18 

 Notoglanis multiradiatus, 162 

 Notophthalmusedentatus, 208, 209; marginatus, 208, 



209 

 notospilus, Hemidoras, 65, 76, 92, 113, 193, 195 

 novenifasciatus, Leporinus, 299, 300, 308 

 nuchalis, Arius, 145; Audienipterus, 65, 202; 



Galeichthys, 145; Hypophthalmus, 202; Tachi- 



surus, 146 

 nudiceps, Chsetostomus, 236; Hypostomus, 25, 236 

 Numb fish, 45 



obesus, Arius, 18 



obscurus, Auchenipterus, 29, 200; Rivuhis, 71; 



Trachycorystes, 29, 65, 77, 111, 198, 200 

 oceanicus, Gobius, 523 



oeellaris, Cichla, 20, 22, 23, 72, S3, 89, 90, 98, 112, 509 

 ocellatum, Xiphostoma, 19, 411 

 ocellatus, Astronotus, 72; Gymnothorax, 27; Lyco- 



dontis, 27, 442; Pcecilobrycon, 67, 79, 88, 89, 96, 



107, 114,284,286 

 ocellifer, Hemigranimus, 68, 79, 89, 332, 335; 



Holopristis, 335 



Ochmacanthus, 210; flabelliferus, 57, 66, 77, 89, 92, 



213 

 Odontognathus, 444; mucronatus, 71, 82, 446, 447 

 Odontostilbe, 255; fugitiva, 311; melandetus, 57, 68, 



79, 89, 93, 312 

 Old-wifes, 15 



oligocanthus, Acnodon, 70, 81, 388; Myleus, 388 

 oligolepis, Mocnkhausia, 26, 68, 79, 93, 97, 100, 101, 



105, 321, 323, 325; Tetragonopterus, 321 

 oncina, Arius, 18; Centromochlus, 65 

 Ophiocephalops, 418 

 Ophisternon bengalensis, 442 

 ophthalmicus, Pimelodus, 168 

 opisthopteroe, Siluridte, 210 

 orbicularis, Fowlerina, 69, 80, 90, 91, 97, 107, 322, 



323, 374; Paratrygon, 28, 75; Tetragonopterus, 



374; Trygon, 118 

 orbignianus, Tetragonopterus, 360 

 orbignyana, Pellona, 446 

 orbignj'i, Ta-niura, 117 

 orestes, Hemidoras, 193 



orientahs, Astyanax, 360; Tetragonopterus, 360 

 orinocensis, Anostomus, 68; Eigenmannia, 67 

 ornata, Pseudorhamdia, 175 

 ornatus, Pimelodus, 65, 76, 96, 172, 175 

 orthodus, Poecilurichthys, 361 

 Orthosternarchus, 424 

 orthottenia, Bryconodon, 370 



orthus, Hemigrammus, 68, 80, 89, 97, 114, 332, 336 

 ortmanni, Heterogramma, 72, 83, 89, 90, 98, 100, 



101, 115,506 

 ortoni, Tetragonopterus, 320 

 oseryi, Xiphostoma, 411 

 Osteoglossidff, 84, 85, 86, 93, 443, 449 

 Osteoglossum, 449; arowana, 18, 450; bicirrhosum, 



18, 27, 71, 82, 93, 450; vandelUi, 450 

 Otolitliinffi, 465, 466 

 Otolithus cayennensis, 466; leiarchus, 22; microps, 



467; rhomboidaUs, 466; toe-roe, 22; virescens, 467 

 ovaUs, Moenkhausia, 68 

 Oxydoras, 132, 192; acipenserinus, 191; carinatus, 



194; niger, 17, 24, 65, 76, 92, 189, 190 

 Oxylabrax undeeimalis, 481 

 Oxyloricaria platystoma, 251 

 oxyrhynchus, Carcharias, 28: Doras, 194; Sternar- 



chorhynchus, 28, 64, 70, 82, 90, 91, 97, 438; 



Sternarchus, 27, 437 



Pachypops, 465, 478; adspersus, 477; biloba, 475; 



furcra}us, 20, 72, 83, 474, 475; grunniens, 20, 72, 



83, 93, 475, 476; trifiUs, 72, 474 

 Pachyurus furcrteus, 93, 475; schomburgki, 98; 



squamosissimus, 472 

 Pacu, 112, 270, 395; nigricans, 25 



