Index. 



133 



River-Crabs, 72 

 Robber-Crab, 61 (fig.) 

 Rostrum of Acari, lO'J ; 

 of Crustacea, 13 



S. 



Saccidina, 23, 35 (fig.) 



Salticidae, 101 



Sand-Crabs, 66 



Sandhopper, 45 



Scu-coptes, 113 (fig.) 



Scalpellum, 33 



Sclerocrcmgoii, 53 



Scolopoidra, 127 (fig.) 



Scolopendrellidae, 125 



Scolopendromorpha, 126 



Scorpiones, 84 



Schendijla, 126 



Schizomus, 89 



Schizopoda, 49 



Scutigcra, 128 (fig.) 



Scutigcrclla, 124 (fig.), 125 



Scutigeridae, 128 



Scutum, 33 



Scyllaridae, 56 



Scyllaridea, 56 



Scyllanis, 56 



Scytodes, 91 



Sea-spiders, 11 

 'Scgestria, 101 



Segment, 13 



Seothyra, 101 



Serrula, 105 



Sesarma, 74 



Sexual differences of Crus- 

 tacea, 19 



Shore Crab, 22 (fig.), 35, 44, 

 71 



Shorehopper, 45 



Shrimp, 51 ; Arctic, 53 ; 

 common, 53 ; piuk, 52 



Sicariidae, 91 



Sicariiis, 91 



Silk-glands, 105 



Siphonop}iora, 122 



Siphonophoridae, 122 



Sironidae, 108 



Slaters, 43 



Snares, 97 



Social Spiders, 101 



Solifugae, 102 



Solpuga, 104 



Solpugidae, 104 



Somite, 12 



Spawning of Lobster, 20 



Sperm receptacle, 20 



Sphaeromidae, 42 



Sphacrothcrium, 121 (fig.) 



Spiders, 91 



Spider-Crabs, 68 

 Spinnerets, 91, 93, 94, 96 

 Spinning-mites, 112 

 Spirillosis, 111 

 Spirobolidae, 123 

 Spirostreptidao, 123 

 Sguilla, 47, 48 (fig.) 

 Stcguccjihaliis, 46 

 Stcgodyj^liiis, 101 

 Stenopidea, 51 

 Stenoptis, 51 

 Sternum of Crustacea, 14 ; 



of Trilobita, 78 

 Stink-glands, 107, 120 

 Stomatopoda, 47 

 Stone-Crab, Northern, 



02 (fig.) 

 Streptoccphalus, 26 

 Stridulatory organs, 91, 



127 ; ridges, 103 

 Styloccllus, 108 (Hg.) 

 Stylonurus, 84 

 Swimmerets, 13 

 Swimming Crabs, 70 

 Symphyla, 9, 124 

 Syncarida, 37 



T 



Tnchypleus, 82 



Tail, 87 



Tail-fan, 51 



Talitnis, 45 



Tanaidacea, 40 



Tarantula, 100 



Tarantulidae, 90 



Tarsal comb, 98 (fig.) 



Tartarides, 89 



Tasmanian Crab, 23, 71 (fig.) 



Tcgcnaria, 100 



Telson, 13 



Tergum, of Trilobita, 78 ; of 



Crustacea, 14 ; of Cirri- 



pedia, 34 

 Testis of Crustacea, 19 

 Tetrauychinae, 112 

 TetranycJms, 112 

 Tetrapoda, 114 

 Texas fever. 111 

 Thalassina, 59 

 Tbalassinidea, 59 

 ThclpJnisa, 72 

 Tbelphusidae, 72 

 Thclyphomis, 88 (fig.) 

 Theraphosa, 94 

 Theridiidae, 92, 98 

 Thcridion, 98, (fig.) 

 Thomisidae, 99 

 Thompson, 31 

 Thoracica, 32 



Thorax of Crustacea, 14 

 Ticks, 109, 110 

 Tick-fever, 111 

 Toxicognaths, 125 

 Tracheal tubes, 43, 91, 96, 



119, 120, 121, 122, 125 

 Trap-door nests, 95, 100; 



spiders, 95 

 Triaononychidae, 108 

 Triarthrus, 77 (fig.), 79 

 Trilobita, 9, 77 

 Tnthyreus, 89 

 Trogulidae, 108 

 Trogiilus, 108 

 Trombidiidae, 112 

 Tromhidmm, 112 

 Tiibicinclla, 34 

 Turrilcpas, 33 

 Tyroglyphus, 113 



U 

 Uca, 74 

 Urvdaciis, 86 

 Uropod, 15 

 Uroptychidac, 63 

 Uropygi, 87 

 Urotricha, 87 



Valvifera, 42 

 Vannia, 74 

 Vejovidae, 86 

 Vejovis, 87 

 Vermiformia, 114 



W 



Waddington, 21 

 Water-fleas, 27 

 Water-mites, 112 

 Water-spiders, 101 

 Webs, 97 



Whales, Cirripedes on, 34 

 Whale-lice, 47 

 Whip-scorpions, 87 

 Wolf-spiders, 100 

 Woodlice, 43 

 Wood-Mason, 91 



X 



Xanthidae, 70 

 Xantho, 70 

 Xcncsthis, 94 

 Xiphosura, 11, 81 

 Xiphosw-a, 82 (fig.) 



Zozymus, 70 

 Zcphronia, 122 

 Zephroniodesmus, 122 



