INDEX. 



A. 



Abdomen of Arachnida, 80 ; 



of Crustacea, 13 

 Acauthephyridae, 51 

 Acanthoijcunmarus, 4G 

 Acari, 109 

 Acid-glands, 89 

 Acorn-shells, 33 

 Actinopiis, 95 

 Adaptation to Environment 



in .Crustacea, 21 

 Aegina, 46 (fig.) 

 Aeglea, G3 

 Aegleidae, G3 

 Agelenidae, 92, 100 

 Adbunea, 64 (fig.) 

 Albuneidae, 64 

 Alcock, 59 

 Alima, 48 

 Alipes, 127 

 Alpheidae, 52 

 Amblypygi, 89 

 Amphipoda, 45 

 Anadiastotliele, 93 

 Auartiostigma, 128 

 Anaspidcs, 13, 37 (fig.) 

 Andrews, 62 

 Aiielasmocephalus, 108 

 Anepignathi, 108 

 Anomura, 59 

 Auostraca, 26 

 Antenna of Crustacea, 15 

 Antennule of Crustacea, 15 

 Anthracomarti, 107 

 Ant-like Spiders, 100, 102 

 Appendages of Crustacea, 



15 ; of Arachnida, 80 ; of 



Trilobita, 78 ; of Ouycho- 



phora, 119 

 Apseudes, 40 (fig.) 

 Apus, 26 (fig.) 

 Arachnida, 9, 80 

 Arachnomorphae, 96 

 Araclinomysis, 39 

 Aranca, 97 

 Araneae, 91 

 Arcturidae, 43 

 Arcturus, 43, 44 (fig.) 



I Arctus, 56 



Argas, 111 



Argasinao, 111 



Argiopidae, 97 



Argulus, 30 



Argyroneta, 101 



Arthrobranchia, 17 



Arthropoda, 9 



Artiostigma, 125 



Asellota, 42 



Asellus, 42 



Astacidae, 55 



Astacidea, 53 



Astacoides, 56 



Astacopsis, 55 (fig.), 56 



Astacus, 55 



Astigmata, 113 



Asymmetry in Crustacea, 

 23 



Atractosoma, 122 



Atypidae, 96 



Atypus, 96 (fig.) 



Auditory organ, of Crus- 

 tacea, 19 



Avebury, Lord, 124 



Avicularia, 95 



Aviculariidae, 94 



B. 



Balanus, 32 (fig.), 34 

 Barnacles, sessile, 33 ; 



stalked, 32 

 Basis, 15 



Bathynomus, 41 (fig.), 42 

 Bdella, 113 

 Bdellidae, 113 

 Beetle-mites, 110 

 Bclinurus, 82 

 Belisarius, 85 

 Bird-eating Spiders, 94 

 Birgus, 60, 61 (fig.) 

 Black-currant Mite, 115 

 Bopyrus, 44 

 Borconymplion, 115 (fig.), 



116 

 Bothriuridae, 86 

 Botliriurus, 86 

 Brachydesmus, 123 



Brachyura, 64 

 Brain of Crustacea, 19 

 Branchiae of Crustacea, 17 

 Branchial cavity, 15 ; la 



mellae, 81 

 Branchiopoda, 25 

 Branchiostegite, 15 

 Branchiura, 30 

 Bristly Millipede, 121 (fig.) 

 Broteas, 87 

 Browne, 27 

 Butlieohts, 85 

 Buthidae, 87 

 Buthus, 85 (fig. 



86, 87 



C 



Caerostris, 98.- 



Galappa, 67, 70 



Calappidae, 67 



Callianassa, 59 



Calling Crab, 74 



Calocdlanus, 30 (fig.) 



Calommata, 96 



Galymcnc, 78 (fig.) 



Camarostome, 109 



Cavibarus, 56 



Cancer, 72 



Cancridae, 72 



Capitulum, 32 



Caprellidae, 24, 47 



Caprellidea, 47 



Carapace of Crustacea, 13 ; 

 of Arachnida, 80 



Garcinoscorpms, 82 



Carcinus, 35, 44, 71 



Cardisoma, 74 



Caridea, 51 



Garpiiius, 70 



Catometopa, 73 



Gatophragmiis, 33 



Caudal fork, 29 



Centipedes, 125 



Gcntrurus, 86, 87 



Cephalic shield, 77 



Cephalothorax of Crus- 

 tacea, 14 ; of Arachnida, 80 



Ceratiocaridae, 37 



Gercophonms, 86 



