INDEX 



6ii 



A. bifida, 578 



A. rosacea, 578; 579 



Antennae, 271, 272-3 ; of Crustacea*, 

 292-3, 296, 298, 300, 302, 306, 

 318, 322, 324, 325, 331, 333, 339, 

 340, 348, 349, 354, 355, 356, 358, 

 368; of Insecta*, 383, 406, 414, 

 417, 430, 441 ; of Myriapoda*, 377, 

 379 ; of Trilobita, 287 



Antennal glands, 309; 311, 359, 368 



Antennules, 290; 292-3, 296, 298, 

 302, 306, 318, 322, 325, 333, 338, 

 340,343,347,348,349,355,358,368 



Anterior aorta, of Araneida, 458; of 

 Carcinus (ophthalmic artery), 370 ; 

 of Helix, 484; of Insecta, 391 ; of 

 Lamellibranchiata, 505 ; of Scorpi- 

 onidea, 450; of Sepia, 518 



Anterior cervical groove, 352 



Anterolateral edge, 365 



Antheridia, 53 



Anthomedusae, 133; 138, 139, 140, 

 142. See also Gymnoblastea 



Anthonomus grandis, 43 1 



Anthozoa, see Actinozoa 



Antipathes, 347 



Anurida maritima, 409 



Anus, 121 ; of Amphineura, 476; of 

 Balanoglossiis, 586; of Brachio- 

 poda, 540; of Echinodermata*, 

 547, 550, 560, 564, 570; of Gas- 

 teropoda, 477 ; of Gephyrea*, 268, 

 269; of Haliotis, 490; of Helix, 

 483 ; of Lepas, 340 ; of Mollusca, 

 471; of Nemertea, 205; of Opis- 

 thobranchiata*, 479, 494, 495 ; of 

 Peripatus, 283 ; of Polychaeta, 250 ; 

 of Pterobranchia, 590; of Sepia, 

 517. See also Alimentary canal 



Aorta, of Crustacea, 311; of Helix, 

 484. See also Anterior aorta, 

 Posterior aorta 



Aperture, see Opening 



Aphaniptera, 441 



Aphis rumicis, 419; 418, 420 



Aphrodite, 233 ; 231, 234 



Apical nervous system, of Crinoidea, 

 580; of Echinodermata, 554; of 

 Holothuroidea, 575 



Apical organ, 250, 251, 535 



Apical rosette of the trochosphere, 

 250 



Apis, 433 



A. mellifica, 388, 391, 432 



Aplacophora, 474 



Aplysia, 494; 479, 493, 496 



Apoda, 343 



Apodemes, 303 



Apodous larvae, see Larvae 



Apopyles, 112 



Appendages, Paired, see Limbs 



Appendicularia larva, 597 



Apposition image, 278 



Apseudes, 354 



Apterygota, 406; 385 



Apus, 322; 296, 297, 301, 301, 302, 



324 



A. cancriformis, 322; 323 



Aquatic oligochaets, 258 



Arachnid section of Arthropoda, 270 



Arachnida, 443 



Araneida, 458 



Arcella, 68; 8, 23, 24, 38, 63 



A. discoides, 68 



Archenteron, 120; of polychaete 

 embryo, 250 



Archiannelida, 261 ; 228 



Archicerebrum of Lankester, see 

 Procerebrum 



Archicerebrum sensu stricto, 274 



Architeuthis, 513 



Arenaceous shells, 69 



Arenicola, 240 ; 230, 23 1 , 234, 242, 248 



A. marina, 238; 239, 240 



Argas, 462 ; 462 



A. persicus, 463, 464 



Argonauta, 513 



Argulus,z2^; 337 



A. americanus, 337 



A.foliaceus, 338; 337 



Argyroneta, 459 ; 447 



Arion, 495 



Aristocystis, 582 



Aristotle's lantern, 567; of Echinus 

 esculentus, 568 



Armadillidiiim, 356 



Arms, of Brachiopoda, 539; of 

 Crinoidea, 578 ; of Dibranchiata, 

 515, 519,523, 524,525; of Echino- 

 dermata, 548, 556 ; of Ptero- 

 branchia, 590 



Artemia salina, 318, 321 



Arterial system, of Araneida, 459 ; of 

 Carcinus, 370; of Helix, 484; of 

 Lamellibranchiata, 505 ; of Litho- 

 bius, 378; of Malacostraca, 312; 

 of Scorpionidea, 450. See also 

 Aorta, Vascular system 



39-3 



