570 



MEMOIRS OF THE CARNEGIE MUSEUM 



nasutus, Acestrorhynchus, 43, 70, 81, 114, 407, 411 



nattereri, Pygoeentrus, 69 



Nebris, 465; microps, 72, 83, 470, 471 



nebulosus, Apionichthys, 527; Cestreus, 466 



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- 

 eentrus, 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; Pygoeentrus, 



26; Serrasalmo, 384; Trichomycterus, 211 

 nigro-maculata, Cychla, 20, 509, 510 

 nigrotamiatus, Chaleeus, 18, 301 ; Leporinus, 18, 25, 



68, 79, 88, 96, 300, 301 

 nitida, Avicenna, 6 

 nodosus, Arius, 201 ; Auchenipterus, 201 ; Pelichthys, 



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



Silurus, 201 

 Notarius, 129; grandicassis, 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 

 Notophthalmus edentatus, 208, 209 ; marginatus, 20S, 



209 

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

 novemfasciatus, Leporinus, 299, 300, 30S 

 nuchalis, Arius, 145; Auchenipterus, 65, 202; 



Galeichthys, 145; Hypophthalmus, 202; Tachi- 



surus, 146 

 nudiceps, Chaetostomus, 236; Hypostomus, 25, 236 

 Numb fish, 45 



obesus, Arius, 18 



obscurus, Auchenipterus, 29, 200; Rivulus, 71; 



Trachycorystes, 29, 65, 77, 111, 19S, 200 

 oceanicus, Gobius, 523 



ocellaris, Cichla, 20, 22, 23, 72, 83, 89, 90, 98, 112, 509 

 ocellatum, Xiphostoma, 19, 411 

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



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

 • 107, 114, 284, 2S6 

 ocellifer, Hemigrammus, 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, Moenkhausia, 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 

 opisthopterse, Siluridse, 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 

 orbignyi, Toeniura, 117 

 orestes, Hemidoras, 193 



orien talis, Astyanax, 360; Tetragonopterus, 360 

 orinocensis, Anostomus, 68; Eigenmannia, 67 

 ornata, Pseudorhamdia, 175 

 omatus, Pimelodus, 65, 76, 96, 172, 175 

 orthodus, Pcecilurichthys, 361 

 Orthosternarchus, 424 

 orthotoenia, Bryconodon, 370 

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

 ortmanni, Heterogramma, 72, S3, S9, 90, 98, 100, 



101, 115, 506 

 ortoni, Tetragonopterus, 320 

 oseryi, Xiphostoma, 411 

 Osteoglossida?, 84, 85, 86, 93, 443, 449 

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



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

 Otolithinffi, 465, 466 

 Otolithus cayennensis, 466; leiarchus, 22; microps, 



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

 ovalis, Mcenkhausia, 6S 

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



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

 Oxylabrax undecimahs, 481 

 Oxyloricaria platystoma, 251 

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



chorhynchus, 28, 54, 70, 82, 90, 91, 97, 438; 



Sternarchus, 27, 437 



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



furcraeus, 20, 72, 83, 474, 475; grunniens, 20, 72, 



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

 Pachyurus furcraeus, 93, 475; schomburgki, 98; 



squamosissimus, 472 

 Pacu, 112, 270, 395; nigricans, 25 



