566 



INDEX 



Tylaspis, 179 

 TypUocarcinus, 195 

 Typopeltis, 312 

 Tyroglyphidae, Jf.66 n. 

 Tyrogly pinnae, 4^6 



Tyroglyphus, 464, 466, 481 ; T. longior, 

 466 ; T. siro, 466 



Uliodon, 418 



Uloboridae, 350, 410 



Uloborinae, ^10 



Uloborus, 352, j.10 ; snare of, 352 ; U. 



republicanus, 411 ; U. walckenaerius, 



411 



Unguis, 319, 320 

 Uroctea, 392 ; U. durandi, 392 

 Urocteidae, 386, 392 

 Urodaciuae, 306, 307 

 Urodacus, S07 

 Uroplectes, 306 

 Uropoda, Jffl 

 Uropodinae, Jffl 

 Uroproctus, 312 

 Uropygi, 312 

 Usofila, 393 



Valvifera, 127 

 Vancoho, 362 

 Vectius, 415 

 Vejdovsky, 435 n. 

 Vejovidae, 306, 308 

 Vejovis, 308 

 Vermiforniia, 4@4 

 Verruca, 89, 91 

 Verrucidae, 91 

 Vesicle, of Scorpion, 303 

 Vinson, 349, 360, 362 

 Virbius, 164 5 V- acuminatus, 164 ; 



habitat, 202 



Virchow, on human Pentastomids, 494 

 Viscid globules, on Spider web, 347 



Waite, 13 



Walckenaer, 365, 386 n., 408 n. 

 Walckenaera, 405 ; W. acuminata, 405 

 Walcott, on appendages of Trilobites, 236 ; 



on their development, 238 ; on early 



forms of Eurypterids, 283 n. 

 Wallace, 381 

 Wall-spider, 369 

 Warburton, C., on Arachnida, 295 f., 344 



n., 349 n., 378 n. 

 Ward, on Reighardia, 495 



Wasps and Spiders, 368 



Water-mites, 460, 471, 472 



Water-spider, 357, 415 



Weismann, on Cladocera, 44, 49 



Weldon, W. F. E,., on excretory glands, 

 13 ; on Brauchiopoda, 18 f. ; on respira- 

 tion in Carcinus, 189 



Westring, 327, 384 



Whale-louse, 502 



Whip-scorpions, 309 



White, Gilbert, 342 



Wilder, 366 



Wittemoesia, 157 ; W. inornata, 158 



Winkler, 463 



With, 473 n. 



Wolf-spiders, 341, 356, 359, 369, 375, 

 377, 381, 417 



Wood-Mason, 328 



Woods, H., on Trilobita, 219 f. ; on 

 fossil Xiphosura, 277 f. ; on Euryp- 

 terida, 281 f. 



Xanthidae, 191 

 Xantho, 191 ; habitat, 198 

 Xenobalanus globicipitis, 92 

 Xiphocaris, 163 ; distribution, 210 

 Xiphosura, 258, 259 f. ; classification, 



260, 276 ; fossil, 277 f. ; affinities with 



Eurypterida, 292 



Xiphosura, 276 ; X. polyphemus, 276 

 Xiphosuridae, 276 

 Xiphosurinae, 276 

 Xysticus, 412 ; X. cristatus, 412 ; X.pini, 



413 



Zacanthoides, 247 



Zaeslin, on the frequency of human Penta- 

 stomids, 494 



Zeriana, 429 



Zilla, 409 ; Z. x-notata, 359, 409 



Zimris, 396 



Zoaea, compared with Cumacea, 120 ; with 

 Erichthus, 143 ; Calyptopis of Euph- 

 ausia, 144 ; of Peneus, 160 ; of'Serges- 

 tidae, 161 ; of PorceUana, 169, of 

 Birgus, 174 ; of Eupagurus, 179 ; of 

 Corystes cassivelaunus, 182 



Zodariidae, 317, 399 



Zodarion, 399 



Zora, 397 ; Z. spinimana, 396 



Zoropsis, 415 



Zoropsidae, 415 



END OF VOL. IV 



Printed by R. & R. CLARK, LIMITED, Edinburgh. 



