690 



INDEX 



Argyroneta, 531; 519 



Arion, 570 



Arista, 477, 511 



Aristocystis, 658 



Aristotle's lantern, 643 ; of Echinus 

 esculentus, 644 



Armadillidium, 397 



Arms, of Brachiopoda, 615; of 

 Crinoidea, 654; of Dibranchiata, 

 589, 594, 599, 600, 602; of Echino- 

 dermata, 624, 632; of Echinoderm 

 larvae, 632, 633; of Pterobranchia, 

 668 



Artemia salina, 356, 359 



Arterial system, of Araneida, 531 ; of 

 Carcinus, 414; of Helix, 556; of 

 Lamellibranchiata, 579 ; of Litho- 

 bius, 421 ; of Malacostraca, 348; of 

 Scorpionidea, 522. See also Aorta, 

 Vascular system 



Artery, Antennary, Dorsal abdominal 

 (posterior aorta), Gastric, Hepatic, 

 Ophthalmic (anterior aorta), ster- 

 nal. Ventral abdominal. Ventral 

 thoracic, of Crustacea Decapoda, 

 350, 412, 413; Cephalic, Supra- 

 neural, of Chilopoda, 421 ; Gastro- 

 intestinal, Hepatic, Pallial, Ter- 

 minal, of Lamellibranchiata, 580; 

 Lateral, Supraneural, of Arach- 

 nida*, 522, 529, 530; Pedal, of 

 Mollusca*,557, 581. See also Aorta 



Arthrobranchiae, 404 



Arthropoda, 3^5; i, 2, 317 



Articulamentum, 549 



Ascaris, 245 ; 246, 248 ; lumbricoides, 



254 



Ascidia, 681 ; 680 



Ascidia (Insecta), 437 



Ascidiacea, 680; 679 



Ascidiae compositae, 680 



Ascidian tadpole, 675 ; 676 



Ascon grade, 120 



Ascopus, 240 n. 



Ascothoracica, 385 ; 377 



Asellus, 398; 336; aquaticus, 399 



Asexual reproduction, 5 ; of Aquatic 

 oligochaetes*, 293, 294; of Meta- 

 zoa, see Budding, Strobilation ; of 

 Porifera, 123 ; of ProtOzoa, see Aga- 

 mogony, Schizogony, Sporogony; 

 of Turbellaria, 213 



Aspidiotus perniciosus, 478 



Aspidobranchiata, see Diotocardia 



Aspidochirotae, 652 

 Aspirigera, see Holotricha 

 Asplanchna, 241 

 Astacura, 404 



Astacus, 404 ; 315, 329, 332, 338, 341, 

 343, 345, 347, 407 1 fluviatilis, 350, 



351, 405 



Asterias, 638; 634, 636, 637; rubens, 

 624, 637 ; vulgaris, 631 



Asterina, 638 ; 630 



Asteroidea, 634; 623 



Asterope, 268 ; 264, 266 



Astomata, 107 



Astroides, 190 



Astropecten, 638 



Atractonema, 256, 257 



Atrial opening, 669, 677, 679 



Atrial siphon, 669 



Atrium, Genital, see Genital atrium; 

 of Cephalochorda, 677 ; of Tuni- 

 cata*, 673, 675, 677, 678 



Atropus pulsatoria, 472 



Auchenorhyncha, 476 



Aulactinia, 188 



Aulactinium, 83 ; actinastrum, 82 



Aurelia, 174-80, 176, 177; aurita, 

 174; 175; Strobilation of, 178, 178 



Auricles, of Arenicola, 275 ; of 

 Gasteropoda, 552; of Lamelli- 

 branchiata, 579 ; of Mollusca, 544 ; 

 of Sepia, 593 



Auriculae, 645 



Auricular organs, 201 



Auricularia larva, 632 ; 632, 668 



Autogamy, 33 ; 83 



Autolytus, 268; 278 



Autosomes, 480 



Autotomy, 340 



Autozooids, 185 



Avicularia, 608 



Axelsonia, 465 



Axial filament, 15 



Axial organ, 628; of Crinoidea, 656; 

 of Holothuroidea, 650 



Axial sinus, 627; of Echinoidea, 646 



Axon, 137, 138 



Axopodia, 14, 15 



Axostyles, 17 



Babesia, see Piroplasnia 



Bacillus pestis, 513 



Baculites, 605; 602, 605; cape?isis, 



605 ; chicoensis, 605 

 Badhamia, 86 



