146 FISHES OF PENNSYLVANIA. 
Notropis bifrenatus, 37 
Notropis chalybezeus, 41 
Notropis dilectus, 44 
Notropis dinemus, 45 
Notropis hudsonius, 34, 38, 39 
Notropis jejunus, 41 
Notropis megalops, 40 
Notropis photogenis, 43 
Notropis procne, 37 
Notropis scabriceps, 42 
Notropis whipplei, 39 
Noturus, 15, 18 
Noturus flavus, 18 
Noturus gyrinus, 20 
Noturus insignis, 19 
Noturus marginatus, 20 
O. 
Okow, 128 
Oncorhynchus, 72 
Oncorhynchus chouicha, 72 
Osmerus, 64 
Osmerus mordax, 64 
iP: 
Paddle-fish, 3, 4 
Paddle-fishes, 3 
Painted tail, 117 
Paludina, 136 
Pearch, black, 117 
Pearch, trout, 117 
Perea, 126 
Perea flavescens, 126 
Percesoces, 100 
Perch, 113 
Perch, black, 117 
Perch, bridge, 104, 117 
Perch, chinquapin, 102, 104 
Perch, goggle-eyed, 102 
Perch, log, 122 
Perch pike, 127 
Perch, pirate, 101 
Perch, red-bellied, 113 
Perch, red-eyed, 105 
Perch, ringed, 126 
Perch, sand, 102 
Perch, silver, 102 
Perch, speckled, 104 
Perch, strawberry, 102, 104 
Perch, striped, 126 
Perch, sun, 118 
Perch, tin, 104 
Perch, trout, 84, 117 
Perch, white, 132, 135 
Perch, yellow, 117, 126 
Pereide, 119 

Percopsidze, 84 
Percopsis, 84 
Percopsis guttatus, 84 
Petrom.yzon, 1, 2 
Petromyzon concolor, 3, 9 
Petromyzon marinus, 2 
Petromyzontide, 1 
Phenacobius, 46 
Phenacobius teretulus, 46 
Phoxinus, 52 
Phoxinus elongatus, 52 
Phoxinus funduloides, 52 
Phoxinus margaritus, 53 
Physa, 8 
Picarel, 128 
Pickerel, 92, 128, 130 
Pickerel, banded, 89 
Pickerel, chain, 90 
Pickerel, eastern, 91 
Pickerel, great northern, 92 
Pickerel, little, 90 
Pickering, 130 
Picorellus, 89 
Pike, 91 
Pike, blue, 94, 128, 129 
Pike, bony, 10 
Pike, federation, 91 
Pike, grass, 92, 128 
Pike, gray, 130 
Pike, great, 94 
Pike, green, 91, 128, 130 
Pike, lake, 92 
Pike, mackerel, 89 
Pike perch, 127 
Pike, sand, 130 
Pike, wall-eyed, 128 
Pike, yellow, 128 
Pilot-fish, 66 
Pimelodus lemniscatus, 20 
Pimelodus livrée, 20 
Pimephales, 35 
Pimephales notatus, 36 
Pimephales promelas, 35 
Pirate perch, 101 
Pisces, 3 
Placopharynx, 31 
Placopharynx carinatus, 31 
Planorbis, 8 
Poecilichthys, 121 
Polyodon, 3 
Polyodon spathula, 3 
Polyodontidee, 3 
Pomoxys, 102 
Pomoxys annularis, 103 
Pomoxys sparoides, 102 
Prosopium, 66 
Pumpkin seed, 116 
