562 



INDEX 



Psalistops, 389 



Psechridae, 399 



Psechrus, 399 



Pseiiclalibrotus, 137 



Pseudidiops, 38S 



Pseudocuma, 131 ; distribution, 215 



Pseudocumidae, 121 



Pseudoniscus, 279 



Pseudo2Jallene, 511, 537 ; P. circularis, 

 540 ; P. spinipes, 537 11. 



PsendoscoriDiones, 258, 4^0 f. ; habits, 

 430 ; external structure, 431, 432 ; 

 internal structure, 433 ; development, 

 434, 435 ; classittcation, 436 ; British 

 species, 438 



Psendo-stigmatic organs, 467 



Pseudozoaea, larva of Stoniatopnd, 143 



Pf.erocuma, 121 



Pterolichus, 4OG 



Pteronyssus, 466 



Pterygometopuf!, 2 49 



I'tenjgotns, 283, 291, 292 ; P. osiliensis, 

 290 



Ptychoparia, fJ47 



Pucetia viridi.% 419 



Pupa, of Cirripedia, 81, 82 



PurceUia, 44^ 



Pychnogonides, 501 n. 



Pycnogonida, 501 f. ; body, 505 ; cIil-Io- 

 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 



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

 P. crassirostre, 540 ; P. littorale, 501, 

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

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

 nodnlosum, 540 ; P. orientcde, 540 ; P. 

 'philippineuse, 540 ; P. pusillum, 540 ; 

 P. stearnsi, 540 



Pygidium, 235 



Pylochdes, 180 ; P. miersii, 173 



Pylochelidae, ISO ; liabitat, 204 



Pylopagurus, ISO ; relation to Lithodidae, 

 177, 'l78 



Pyrgoma, 92 



Rachias, SS8 



Railliet, on classification of Pentastomids, 



495 

 Ranina 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 



Regillus, 414 



Reichenbach, on embryology of Astacus, 

 12 



Reighardia, 495, 497 ; hosts of, 497 



Remipes, 17 1 ; R. scutellatus, 171 



Remop/enn'des, 2S2, 247; R. radians, 229, 

 248 



Reproduction (incl. Breeding), of Clado- 

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

 Lobster, 156 ; of Limulus, 274 ; of 

 Spiders, 305 ; of Ticks, 461 ; of Pycno- ' 

 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 Pentastoniida, 

 492 fof Pycnogons, 519 



Respiration, of Crustacea, 16 ; of Jnas- 

 pides, 115 ; of Albimea, 170 ; of 

 Corystes, 170, 189 ; of Biryus, 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- 

 stoniida, 491. (See also Resjiiration.) 



Rhagudes, 425, 429 



Rhagodinae, 4~9 



Rhax, 429 



Rhipiicentor, 469 



Rhipirephcdus, 469 ; R. sanguineus, 470 



Rhizocephala, 95 f. ; compared •wifii Afon- 

 strilla, 66 ; with Anelasma, 89 ; castra- 

 tion caused by, 100 ; males, 106 ; 

 association with Entoniscidae, 136 



Rhomphaea, 402 



Rhopalorhynchus, 532 ; R. davipes, 533 ; 

 R. kroyeri, 533 ; R. tenuissimus, 533 



Rhynchothoracidae, 535 



Rhynchothorax, 505, 535 ; R. ausfrcdis, 

 536 ; R. mediterraneus, 508, 535, 

 536 



Ricinulei, 439 



Robber-crab, 173 



Roncus, 436, 438 



Rucker, 423 



Rudoli^hi, on Pentastoma, 488 n. 



Sabacon, 451 



Sahelliphihis, 71 



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



99 ; castration caused by, 100 f. ; S. 



carcini, 96 ; S. negleda, Nauplius^ 97 ; 



