562 



INDEX 



Psalistojis, 389 



Psechridae, 399 



Psechrus, 399 



Pseudalibrotus, 137 



Pseudidiops, 388 



Pseudocuma, 121 ; distribution, 215 



Pseudocumidae, 121 



Pseudoniscus, 279 



Pseudopallene, 511, 537; P. circtdaris, 

 540 ; P. spinipes, 537 n. 



Pseudoscorpiones, 258, 430 f. ; habits, 

 430 ; external structure, 431, 432 ; 

 internal structure, 433 ; development, 

 434, 435 ; classification, 436 ; British 

 species, 438 



Pseudo-stigmatic organs, 467 



Pseudozoaea, larva of Stomatopod, 143 



Pf.erocmna, 121 



Pterolichus, JC6 



Pteronyssus, 466 



Pterygometopus, 249 



Pterygotus, 283,291, 292; P. osiliensis, 

 290 



Ptychoparia, 247 



Pncetia viridis, Jf.19 



Pupa, of Cirripedia, 81, 82 



Purcellia, 44$ 



Pychnogonides, 501 n. 



Pycnogonida, 501 f. ; body, 505 ; chelo- 

 phores, 505 ; palpi, 507 ; ovigerous 

 legs, 507 ; glands, 511 ; alimentary 

 system, 513 ; circulatory system, 516 ; 

 nervous system, 516 ; eyes, 517 ; in- 

 tegument, 518 ; reproductive organs, 

 519 ; eggs, 520 ; development, 520 ; 

 habits, 524 ; systematic position, 525 ; 

 classification, 528 f. ; British species, 

 540 f. 



Pycnogonidae, 539 



Pycnogonum, 503, 539 ; P. australe, 540; 

 P. crassirostre, 540 ; P. IMorale, 501, 

 540, 541 ; P. magellanicum, 540 ; P. 

 magnirostre, 540 ; P. microps, 540 ; P. 

 nodulosum, 540 ; P. orientate, 540 ; P. 

 philippinense, 540 ; P. pusillum, 540 ; 

 P. stearnsi, 540 



Pygidium, 235 



Pylocheles, 180 ; I 1 , miersii, 173 



Pylochelidae, 180 ; habitat, 204 



Pylopagurus, 180 ; relation to Lithodidae, 

 177, 178 



Pyrgoma, 92 



Rachias, 388 



Railliet, on classification of Pentastomids, 



495 



Rani'iia dentata, 188 

 Raninidae, 188 

 Rastellus, 320, 387 

 Ratania, 68 ; mouth. 63 

 Reaumur, 360 

 Recurved eyes, 316 



Red spider, 455, 472 



Red-water, 456 



Regeneration, of Crustacean limbs, 155, 

 156 



Regilhis, 414 



Reichenbach, on embryology of Astacus, 

 12 



Reighardia, 495, 497 ; hosts of, 497 



Remipes, 171 ; R. scutettatus, 171 



Remopleurides, 232,^7; R. radians, 229, 

 248 



Reproduction (incl. Breeding), of Clado- 

 cera, 43 f. ; of Anaspides, 116 ; of 

 Lobster, 156 ; of Limulus, 274 ; of 

 Spiders, 365 ; of Ticks, 461 ; of Pycrio- 

 gons, 520 



Reproductive (generative) organs, of Crus- 

 tacea, 15 ; of Phyllopods, 31 ; of 

 Cladocera, 43 ; of Arachnids, 257 ; of 

 Limulus, 271 ; of Scorpions, 305 ; of 

 Spiders, 333 ; of Solifugae, 428 ; of 

 Phalaugidea, 446 ; of Acarina, 461 ; of 

 Tardigrada, 482 ; of Pentastomida, 

 492 f of Pycnogons, 519 



Respiration, of Crustacea, 16 ; of Anas- 

 pides, 115 ; of Albunea, 170 ; of 

 Corystes, 170, 189 ; of Birgus, 174 ; 

 of Oxystomata, 186, 187; of Cato- 

 metopa, 194, 195 ; of Arachnids, 256. 

 (See also Respiratory organs. ) 



Respiratory organs, of Arachnids, 256 ; 

 of Limulus, 269, 270 ; of Eurypterids, 

 288 ; of Scorpions, 305 ; of Spiders, 

 336 ; of Tardigrada, 482 ; of Penta- 

 stomida, 491. (See also Respiration. ) 



Rhagodes, 425, 429 



Rhagodinae, 4~& 



Rhax, 429 



Rhipicentor, 469 



Rhipicephalus, 469 ; R. sanguineus, 470 



Rhizocephala, 95 f. ; compared with M<m- 

 strilla, 66 ; with Anelasma, 89 ; castra- 

 tion caused by, 100 ; males, 106 ; 

 association with Entoniscidae, 136 



Rhomphaea, 402 



Rhopalorhynchns, 532 ; R. clavipes, 533 ; 

 R. kroyeri, 533 ; R. tenuissimus, 533 



Rhynchothoracidae, 535 



Rhynchothorax, 505, 535 ; R. austi-ftfix, 

 536 ; R. mediterraneus, 508, 535, 

 536 



Ricinulei, 439 



Robber-crab, 173 



Roncus, 436, 438 



Rucker, 423 



Rudolphi, on Pentastoma, 488 n. 



Sabacon, 451 



Sabettiphilus, 71 



Sacculina, 95 ; life-history, 96 f. ; males, 



99 ; castration caused by, 100 f. : X. 



carcini, 96 ; S. neylecta, Nauplius, 97 ; 



