566 



INDEX 



Tylaspis, 179 

 Typhlocarcinus, 195 

 Typopeltis, S12 

 Tyroglyphidae, ^6'6 n. 

 Tyroglyphinae, 4^jI'> 



Trjroglyplms, 464, It66, 481 ; T. longior, 

 466 ; T. siro, 466 



Uliodon, 41s 



Uloboridae, 350, 4IO 



Uloborinae, 4^'^ 



Uloborus, 352, 4IO ; snare of, 352 ; U. 



repuhlicanus, 411 ; V. walckenaerius, 



411 

 Unguis, 319, 320 

 Uroctea, 392 ; U. durandi, 392 

 Urocteidae, 386, 39ti 

 Urodacinae, 306, 3U7 

 Urodacus, 307 

 Uroplectes, 306 

 Uropoda, 4"^! 

 Uropodinae, 4'^1- 

 Uroproctus, 312 

 Uropygi, 312 

 Usojila, 393 



Valvifera, 127 



Vancoho, 362 



Vectius, 415 



Vejdovsky, 435 n. 



Vejovidae, 306, SOS 



Vejovis, 30S 



Vermiformia, 4^4 



Verruca, 89, 91 



Verrucidae, 91 



Vesicle, of Scorpion, 303 



Vinson, 349, 360, 362 



Virhius, 164 '■> ^ • aciiminatus, 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. acnmiinata, 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 



Willemoesia, 157 ; ir. 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 

 Xenohalanus glohicipitis, 92 

 Xipjhocaris, 163 ; distribution, 210 

 Xiphosura, 258, 259 f. ; classification, 



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



Eurypterida, 292 

 Xiphosxira, 276 ; X. polyphemus, 276 

 Xiphosuridae, 276 

 Xiphosurinae, 276 

 Xysticus, Jf.12 ; A'. cristaUis, 412 ; X. piini, 



413 



Zacnnthoides, 247 



Zaesliu, on the frequency of human Penta- 

 stomids, 494 



Zeriana, 429 



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



Zimris, 396 



Zoaea, compared with Cumacea, 120 ; with 

 Erichthus, 143 ; Calyptopis of Euph- 

 ausia, 144 ; oi Peneus, 160 ; ofSerges- 

 tidae, 161 ; of PorceUana, 169, of 

 Birgus, 174 ; of Hupcgin-Ks, 179 ; of 

 Corystes cassive/annus, 182 



Zodariidae, 317, 399 



Zodarion, 399 



Zora, 397 ; Z. spinimana, 396 



Zoropsis, 415 



Zoropsidae, -^iJ 



END OF VOL. IV 



Printed by R. & R. Clark, Limited, Edinburgh. 



