INDEX 
Orithyia coccinea, 524, 540 
Ornithodoros, 469: O. megnini, 469; O. 
moubata, 469; O. talaje, 469; O. turi- 
cata, 469 
Orn ithoscatotdes, 374 
Orometopus, 226, 245 ; 0. 230 
Ortmann, on Brachyura, 181 n. ; on bipo- 
larity, 200 ; on crayfishes, 213 ; on Pyc- 
nogons, 513 n. 
Ostracoda, 107 ; pelagic, 202 
Oudemans, 528 1. 
Ovary, of Cladocera, 44, 45; of Danalia, 
132 ; of Spiders, 332 
Oxynaspis, 88 
Oxyopes, 419 ; O. lineata, 419 
Oxyopidae, 479 
Oxyptila, 412 
Oxyrhyncha, 797 f. ; 
192 ; habitat, 198 
Oxystomata, 785 f. ; respiration, 186, 187 
habits, 192 ; enemies, 
Pachycheles, 170 ; 
bution, 202 
Pachygnatha, 407; P. clerckii, 
degeerti, 407 ; P. listeri, 407 
Pachygrapsus, 196; P. marmoratus, 193, 
194, 196 
Pachylasma giganteum, 91 
Pachylomerus, 388 
Pachysoma, 69 
Paguridae, 780; eyes of deep-sea, 149, 
150 
Paguridea, 777 
Pagurinae, 7SO 
Palaemon, 1643; excretory glands, 13; 
fresh-water, 212 ; P. serratus, 158, 164 ; 
Bopyrus parasitic on, 133 
Palaemonetes, 164; P. antrorum, habitat, 
210; P. varians, 161 ; distribution, 212 
Palaemonidae, 159, 764 
Palaeocaris, 115, 118 
Palaeophonus, 294, 298 
Palamnaeus, 307; P. 
tarsus, 304 
Palinuridae, 767 
Palinurus, 165, 167 ; habitat, 198, 202 ; 
P. elephas, 167 ; P. quadricornis, em- 
bryo, 165 
Pallene, 505, 537; P. attenuata, }41; P. 
brevirostris, 510, 524, 537, 5:1, 542 
P. dimorpha, 5388; P. emaci.ta, 541 
P. empusa, 541; P. grubu, 5388; P. 
languida, 537; P. longiceps, 538; P. 
novaezealandiae, 537; P. vroducta, 542; 
P. pygmaea, 537, 541; P. spectrum, 
542; P. spinosa, 537 
Pallenidae, 537 
Pallenopsis, 506, 511 ; 
tritonis, 542 
Palp, of Pycnogons, 507 
Palpal organ, 322, 378 
Palpebral lobe, 227 
P. panamensis, distri- 
407; P. 
swammerdami, 
P. holtt.. 542) 3) PR: 
559 
Palpigradi, 258, 422 
Palpimanidae, 323, 325, 398 
Palpimanus, 398 
Panamomops diceros, 405 
Pandalidae, 764 
Pandalus, 164; P. annulicornis, 164 
Pandinus, 307 
Panoplax, 195 
Pantopoda, 501 n. (= Pyecnogonida, g.v.) 
Panulirus, 165, 167 
Parabolina, 282, saa 
Parabolinella, 2 
Parabuthus, 
Paradoxides, 222, 
bohemicus, 246 
Paragaleodes, 429 
Paralomis, 179, 181 
Paranaspides, 117; P.. lacustris, 117; 
distribution, 210; habitat, 210 
Paranebalia, 242 
Paranephrops, 157 ; distribution, 213 
Paranthura, 124 
Parantipathes, Synagoga parasitic on, 94 
Paranymphon, 507 ; P. spinoswm, 542 
Parapagurus, 180 
Parapallene, 4537 
Parapeneus, 162; P. rectacutus, 159 
Parapylocheles scorpio, eyes, 149 
Parasiro, 448 ; P. corsicus, 448 
Parasites, in Tardigrada, 484 
Parasitic castration, 100, 136 
Parastacidae, 757 ; distribution, 213 
Parastacus, 157 ; distribution, 213 
Paratropidinae, 387 
Paratropis scrupea, 3S7 
Parazetes auchenicus, 533 
Pardosa, 417; female carrying young, 
341; P. amentata, 417, 418 ; P. lugu- 
bris, 418 
Pariboea spinipalpis, 534 
Parthenogenesis, in Phyllopoda, 32); in 
Cladocera, 44, 46, 49 ; in Ostracoda, 108 
Parthenope, 193 ; P. investigator is, 192 
Parthenopidae, 193 
Pasiphaea, 163 
Pasiphaeidae, 163 
Pasithoe, 582; P. uwmbonata, 535; P. 
vesiculosa, 535, 541 
Pasithoidae, 532 
Patten, 270, 271, 277 
Patten. and Redenbaugh, on Limulus, 266, 
270, 272 
Paturon, 319, 320 
Peckham, 376, 377, 378, 381, 382 
Pecten, 328 
Pectines, of Scorpions, 302, 302 ; function 
of, 299 ; of Glytoscorpius, 294 
Pedicle, 317 
Pedipalpi, 258, 308 ; habits, 309 ; external 
structure, 309; legs, 309; internal 
structure, 310; alimentary canal, 310; 
nervous system, 311 ; classification, 312 
298 : P. capensis, 298, 299 
2325 9236247 Ps 
