566 



INDEX 



is, 179 

 Ti/phlocarcinus, 195 

 Typopeltis, 313 

 Tyroglyphidae, 4^6 n. 

 Tyroglyphinae, ^6Vj 



Tyroglyph.us, 464, 466, 481 ; T. longior, 

 466 ; T. siro, 466 



Uliodon, 418 



Uloboridae, 350, 410 



Uloborinae, 410 



Uloborus, 352, 410 ; snare of, 352 ; U. 



republicanus, 411 ; U. walckenaerius, 



411 



Unguis, 319, 320 

 Uroctea, 392 ; U. durandi, 392 

 Urocteidae, 386, 392 

 Urodacinae, 306, 307 

 Urodacus, 3U7 

 Uroplectes, 306 

 Uropoda, #71 

 Uropodinae, Ifil 

 Uroproctus, 312 

 Uropygi, 312 

 Usofila, 393 



Valvifera, 127 

 Vancoho, 362 

 Vectius, Jfl5 

 Vejdovsky, 435 n. 

 Vejovidae, 306, SOS 

 Vejovis, 308 

 Vermiform ia, 46 4 

 Verruca, 89, 'Jl 

 Verrucidae, 91 

 Vesicle, of Scorpion, 303 

 Vinson, 349, 360, 362 

 Virbius, 164 '> 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 



Weldou, W. F. B., on excretory glands, 

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

 tion in Carcinus, 189 



Westring, 327, 384 



Whale-louse, 502 



Whip-scorpions, 309 



Wliite, Gilbert, 342 



Wilder, 366 



Willemoesia, 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 

 Xenobcdanus 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 

 Xyslicus, 412 ; X. cristatus, 412 ; X.pini, 



413 



Zacanthoides, 247 



Zaeslin, on the frequency of human Penta- 

 stomids, 494 



Zeriana, 429 



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



Zimris, 396 



Zoaea, compared with Cnmacea, 120 ; with 

 Erichthus, 143 ; Calyptopis of Euph- 

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

 tidae, 161 ; of Porcellana, 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. 



