602 



IXDE5. 



Anoplura, 568. 

 Antedon, 289. 

 Antennas, 84. 

 Antennal Gland of 



Thoracostraca, 461 

 Antennularia, 242. 

 Antbophora, 698. 

 Anthozoa, 223, 229, 230. 

 Anthrax. 570. 

 Antimere, 25. 

 Antipatharia, 232. 

 Antipathes, 232. 

 Antliata, 572. 

 Ant- lion, 564. 

 Ants, 595. 

 Apatheon, 177. 

 Apatura, 585. 

 Aphalaspida3, 177. 

 Aphaniptera, 578. 

 Aphides, Reproduction 



of, 106, 128. 

 Aphis, 569, 570. 

 Aphodius, 590. 

 Aphrodite, 379. ' 

 Aphrophora, 571. 

 Apical plate of Annelids, 



363. 

 Apical pole of Echinder- 



mata, 268. 

 Apiocrinus, 289. 

 Apiocystites, 289. k ^ 

 Apion. 588. 

 Apis, 598. 

 Apoda, 299, 446. 

 Apolemia, 246, 249. 

 Aporosa, 232. 

 Apseudes, 456. 

 Apsilus, 401. 

 Aptcra, 567. 

 A pus, 419. 

 Arachnida, 484. 

 Aradus, 572. 

 Araneida, 498. 

 Arcella, 136. 

 Archasoniscus, 451. 

 Archffiopteryx, 175. 

 Archegosaurus, 177. 

 Archenteron, 116, 117. 

 Archiannelida, 365, 376. 

 Archigetes, 339. 

 Arenicola, 381. 

 Arethusa, 249. 

 Anras, 495. 

 Argulus, 438. 

 Argynnis, 585. 

 Argyroneta, 499, 504. 

 Arista, 573. 

 Aristotle, classification 



of, 132. 



Aristotle's lantern, 276. 

 Armadillo, 457, 460. 



Arrcnotokia, 543. 

 Artemia, 419. 

 Arterial, 73. 

 Artery, 62. 

 Arthropoda, 405. 

 Arthrostraca, 449. 

 Articulata, 289. 

 Ascalaphus, 564. 

 Ascaltis, 222. 

 Ascanclrn, 222. 

 A scans, 347, 346, 351. 

 Ascetta, 222. 

 Ascilla. 222. 

 Ascomorpha, 404. 

 Ascon, 222. 

 Ascortis, 222. v 

 Asculmis. 222. 

 Ascyssa, 222. 

 Asellus, 460. ; 

 Asilus, 576. 



Aspidochirotre, 298, 209. 

 Aspidiotus, 543, 569. 

 Asplanchna, 404. 

 Astacus. 477. 

 Astasia,'l69. 

 Asteracanthion, ' 285, 



293. 



Asteriadae, 293, 279. 

 Asterias, 293. 

 Asteridea, 279, 292. 

 Asteroidea, 279, 290. 

 Asterope, 427. 

 Astrrea, 229, 232. 

 AstrsBidae, 232. 

 Astroides, 233. -J 

 Astronyx, 294. 

 Astropecten, 275, 292, 



293. 



Astrophyton, 294. 

 Atax, 495. 

 Ateuchus. 590. 

 Athalia, 594. 

 Athorybia, 248, 249. 

 Atolls, 230. 

 Atrocha, 377. 

 Attacus, 584. 

 Attagenus, 590. 

 Atypus, 504. 

 Auditory organs, 85. 

 Aulastcnvam, 400. 

 Aurelia, 261. 

 Aurelio Severino, 133. 

 Auricularia, 281, 282, 



283, 298. 



Autolytus, 372, 379. 

 Aves, vascular system 



of, 67. 



Bacillus, 206. 

 Bacteria, 206, 557. 

 Baer, C. E. von, 137. 



Balaninus, 588. 

 Baianoglossus, 299, 302. 

 Balantidium, 205. 

 Balanus, 446. 

 Bark lice, 127, 570. 

 Barrier reefs, 230. 

 Bathybius, 186. 

 Bathycrinus, 289. 

 Bdella, 495. 

 Bear-caterpillars, 583. 

 Bed-bug, 572. 

 Bedeguar of TOSQS, 594. 

 Bee-louse, 575, 599. - 

 Bees, 697. 

 Beetle-mites, 495. 

 Bee-wolf, 599. 

 Bell Animalcule, 198. 

 Bembex, 596. 

 Boris, 577. 

 Beroe, 264, 266. 

 Bibio, 574, 577. 

 Biesfliegen, 576. 

 Biogenesis, 96. 

 Bipalium, 315. . 

 Bipinnaria, 281, 283, 292, 



293. 



Bird spider, 504. 

 Birgus, 478. 

 Bittacus, 563. 

 Bivium, 269. 

 Bladder- Worm, 332. 

 Blaps, 589. 

 Blastoidea, 289. 

 Blastopore, 114. 

 Blastosphere, 113. 

 Blastostyle, 236. 

 Blastotrochus, 227, 232. 

 Blatta, 557. 

 Blatthornkafer, 589. 

 Blattkafer, 588. 

 Blaulinge, 585. 

 Blendwanzen, 572. 

 Blood-corpuscles, 32. 

 Bockkafer, 588. 

 Body cavity, 50. 

 Body cavity, primary, 



50, 116. 

 Bombardirkafer, 590. 



Bombus, 598. 



Bombycina, 583. 



Bombylius, 576. 



Bombyx, 581, 584. 



Bone, development of, 

 40, 42. 



Bonellia, 392. 



Bonnet, 133. 



Book-lice, 559. 



Bopyrus, 460. 



Borkenkafer, 588. 



Borlasia, 340, 342, 343. 



Eos taurus, origin of, 143. 



