INDEX, 



Acnnthocephala^ 109 ; general characters of; 



114. 

 Acanthometra, 83, 89. 

 AcanthopMs, 245. 

 Acanthopteri, 219. 

 Acarina, 141. 

 Achetina^ 155. 

 Acom-sheUs, 136, W.. 

 Acri/ddum, 156. 

 ^ciiraia, 51, 86. 

 ActirUdcB, 86. 

 ^.c^iTiosoa, 52, 53 ; general '•haracters o:^ 84 ; 



orders of, 86-94. 

 Adjutant, 269. 

 Agouti, 311. 

 Ailurits, 308. 



Air-receptacles of Birds. 261. 

 AlGedinidce, 27T. 

 Alces, 301. 

 Alddx, 267. 



Alcyonaria^ 86 ; characters o:^ 90. 

 Alcyonvwm^ 90. 



Alligator, 248. 



Alpaca, 801. 



Amhlystoma^ 228. 



Ambulacral system of EcHntts, 18, 99. 



Amewa, 245. 



Ametabolic Insects, 160, 153. 



^mmoni^es, 195. 



Ammba, 30 ; nucleus of, 32 : reproduction of, 



82. 

 ATno&bea, 30. 

 Amphibia, 195, 205; general characters of, 



225; orders of, 226-233. 

 Amphioxus, 214, 215. 

 AmpJdpoda, 138. 

 Anacanthini, 219. 

 Analogy, 15. 

 Ana^thropoda^ 119. 

 AnaUdce^ 267. 

 Anguillula, 115. 

 Anguis, 245, 246. 



Animals and plants, differences between, 8-6. 

 AnneUda, 119; general characters of, 120; 



typical segment of; 120 ; divisions of, 



Annuloida, 15 ; characters and divisions o£ 



95. ' 



Aivtmloea, 15 ; general characters of, 118. 

 Anomodontia, 237, 252. 

 Anomura, 181. 



Anoplura, 153. 



^Twrnro, 226, 230, 232. 



Aiiaerince, 267. 



Ant-eaters, 282, 286. 



Antelopes, 803. 



Antennae, 124, 189, 149. 



Anthropoid Apes, 317. 



Ant-Uon, 156. 



Ants, 161, 162. 



Apes, 315, 317. 



Aphaniptera, 155. 



ApTddes^ 154, 155. 



Aphis-Uon, 156, 15T. 



AplwodiU, 124, 125. 



Apidm, 160. 



Aplacental Mammals, 286, 28T. 



Aptera, 150. 



Apteryx, 270, 271. 



Apus, 138. 



Aquiferous system (Sponges), 41. 



Arachnactia^ 86. 



Arachnidfl, 127; general characters of 189; 

 orders of, 140-144. 



Aran&ida., 142. 



ArchcBopteri/x^ 279. 



Arctom/ys, 312. 



Ardea, 269. 



Ardeidm, 269. 



Arenicola^ 124, 125. 



ArgoTiauta, 190, 191. 



Armadillos, 286. 



Arms, of Bradiiopoda, 175; of CeplwZo- 

 poda, 188, 190, 191. 



Arthropoda^ 119; general cbaracterso^ 126, 



Ariicndata^ 126. 



Artiodachjla, 29T, 298. 



^scarw, 115. 



Ascidian MoUusks, 171 ; solitary, sodal, and 

 compound, 173, 



Amvus^ 298. 



Ass, 298. 



Asteroidea. 96: general characters o' 100, 

 101. 



Atolls, 89. 90. 



Atrium (Tunicata), 173. 



Aiichema, 301, 



Aurelia, 80. 



A-ves^ 205 ; general characters of, 253 ; feath- 

 ers ot 253 ; vertebral column of, 254 ; beak 

 of, 255 ; pectoral arch o£ 255 ; hind-limb of, 

 257; foot of, 268 ; digestive system of, 258; 

 respiratory system of; 260; circulatory 



