INDEX 
561 
Pipetta, 514, 533; P. weberi, 583 
Pirata, 417 
Piriform glands, 335, 349 
Pisa, 193 
Pisaura mirabilis, 416 
Pisauridae, 4/6 
Placoparia, 251 
Plagiostethi, 443, 447, 449, 452 
Plagula, 317 
Planes minutus, habitat, 202 
Plankton, characters of, 203 ; fresh-water, 
207, 216; Cladocera in, 50 
Plastron, 316 ‘ 
Plate, on Tardigrada, 481, 482, 484 
Plator insolens, 415 
Platoridae, 475 
Piatyarthrus hoffmannseggti, 129 
Platyaspis, 121 
Platybunus, 450, 451 
Platycheles, 535 
Plectreurys, 393 
Pleopod, defined, 110 
Pleura, 234 f. 
Pleurocrypta microbranchiata, 133 
Pleuromma, 59; P. abdominale, 59; P. 
gracile, 59 
Pliobothrus symmetricus, Pycnogon larvae 
in, 523 
Pocock, 298, 308 n., 312, 828, 329, 425 n., 
534 n. 
Podasconidae, 730 
Podogona, 258, 439 
Podon, 54 
Podophthalmata, 112 
Podoplea, 67 
Podosomata, 501 n. (= Pyenogonida, q.v.) 
Poecilotheria, 390 
Poisonous hairs, of Spiders, 365 
Pollicipes, S84; fertilisation, 86 ; P. cornu- 
copia, 85; P. mitella, 85 
Pollock, 340 
Poltyinae, 410 
Poltys, 410; P. ideae, 318 
Polyartemia, 36 ; antennae, 26,-28 ; range 
of, 34; P. forcipata, 36 
Polyaspidae, 84 
Polycopidae, 709 
Polygonopus, 539 
Polyphemidae, 44; appendages, 
ovary, 47 ; reproduction, 49 
Polyphemus, 47, 54; P. pediculus, habi- 
tat, 206, 208 
Polysphincta carbonaria, 
Spiders, 368 
Pompeckj, on Calymenidae, 244 
Pompilus, 368 
Pontellidae, 60 
Pontoporeia, 137; distribution, 212; P. 
affinis, 138; P. femorata, 188; P. 
loyi, 188; P. microphthalma, 138 
Porcellana, 168, 170; Zoaea, 168; P. 
42; 
parasitic on 
platycheles, 170 
VOL. IV 
Porcellanidae, 770 ; habitat, 198 
Porcellio, 129 
Porcupine, 540 
Porhomma, 406 
Porocephalus, 488 n., 495; P. annulatus, 
490, 496; P. aonycis, 496.; P. armil- 
latus, 496; P. bifurcatus, 496; P. 
clavatus, 496 ; P. crocidura, 496; P. 
crotali, 496; P. geckonis, 496; P. 
gracilis, 496; P. heterodontis, 496; 
iP. indicus, V496"s) Po lari. 496): se. 
megacephalus, 497; P. megastomus, 
497 ; P. moniliformis, 497; P. najae 
sputatricis, 497 ; P. oxycephalus, 497 ; 
P. platycephalus, 497 ; P. proboscideus, 
493, 494; larvae of, 493, 494; hosts 
of, 496; P. protelis, larva, 495; P. 
subuliferus, 497 ; P. teretiusculus, 489, 
491, 492, 492, 497; P. tortus, 497 
Portunidae, 797 
Portunion, 134; P. maenadis, 134 ; life- 
history, 135, 136 
Portunus, 191 
Potamobius (= Astacus), 157 ; distribu- 
tion, 213 
Potamocarcinus, 191 ; distribution, 213 
Potamon, 191 
Potamonidae, 797 
Praniza, larva of Gnathia, 125 
Prawn, 151, 153, 158, 164, 198; fresh- 
water, 212, 214 
Pre-epistome, 443 
Prestwichia (Euproéps), 275, 278, 279 
Preyer, on anabiosis in Tardigrades, 484 
Prionurus, 298, 299 
Prismatic eye, of Trilobites, 229 
Procurved eyes, 316 
Prodidomidae, 395 
Prodidomus, 396 
Proétidae, 251 
Proétus, 251; P. bohemicus, 248 
Prokoenenia, 423; P. chilensis, 423; P. 
wheeleri, 423 
Prolimulus, 279 
Promesosternite ia Limulus, 264 
Proparia, 244 
Prosalpia, 450 
Prosoma, of Arachnida, 260 ; of Limulus, 
260, 263; of Eurypterida, 285; of 
Scorpion, 307 
Prosthesima, 397 
Prostigmata, 471 
Protaspis, 239, 239, 240 
Proteolepas, 94; P. bivincta, 94 
Protocaris, 243 
Protolenus, 247 
Protolimulus, 279 
Protolycosa anthrocophila, 383 
Przibram, on regeneration in Crustacea, 
156 
Psalidopodidae, 764 ; habitat, 204 
Psalidopus, 164 
LEO) 
