INDEX. 
Asranontate Worms, 272, 352. 
Absorbent System, 93. 
Acaleph, alternate generation of, 207. 
we structure of, 238, 37S. 
Acarina, 277, 353. 
Acarus, 353. 
Acipenser, 303, 354. 
Acorn-shells, 274. 
Actinaria, 350. 
Actinia, anatomy of, 74. 
BE described, 241, 350. 
«* development of, 200. 
Actinophrys, 349. 
Adder, 308. 
Adipose Tissue, 36. 
ABolis, 262. 
Agastric Animals, 370. 
Air-bladder of Fishes, 116, 372. 
Air-breathers, 111, 113. 
Albatross, 317. 
Alcyonaria, 350. 
Alcyonium, 350. 
Alimentary Canal, 73. 
Allantoidea, 380... 
Allantois, 198. 
Alligator, 312, 355. 
Alternate Generation, 206, 239. 
Ambulacra, 129, 252. 
Ammonite, 266. 
Amunion, 197. 
Ameba feeding, 50, 74. 
‘© locomotion of, 155. 
<5 structure of, 232, 349. 
American Types, 384. 
Amphibians, described, 305, 354, 381. 
oe eggs of, 193. 
Amphicelous, 373. 
Amphioxus, 50, 302, 374, 380. 
Anallantoidea, 380. 
Analogy, 211. 
Anchy losis, 142. 
Anguis, 354. 
Animalcules, mouth of, 54. 
Animals and Plants, 21, 368. 
Annelids, 270, 352. 
Annuloida, 271, 352. 
Anoura, 354, 
Anser, 355. 
Ant-eater, 330, 370. 
Antenne, 174, 374. 
Anthozoa, 241, 350. 
Ants, 293. 
Aorta, 103. 
Ape, 151, 343, 383. 
Apis, 353. 
Aplysia, 262. 
Apteryx, 319. 
Arachnid, 277, 353. 
Araneina, 278, 353. 
Archetype, 137. 
Ardea, 319, 355. 
Areolar Tissue, 35. 
Argonauta, 268. 
Armadillo, 133, 330. 
Arteries, 103. 
Arthropoda, 379. 
Articulates, circulation in, 105. 
a described, 226, 269, 352. 
a digestion in, 77, 91. 
Ascidian, circulation in, 106. 
S described, 256, 350. 
KS mouth of, 55. 
Astacus, 273, 352. 
Asterias, 251, 350. 
Asteroidea, 55, 75, 91, 111, 129, 159, 250, 
350. 
Astrea, 243. 
Atavism, 210. 
Attacus, 291, 353. 
Auk, 316. 
Aurelia, 239, 350. 
Aves, 313, 355. 
