INDEX. 



Abranchiata. 



Abranchiata, xl. 



Acanthobdella, 131. 



Acanthocephali, 155. 



Acanthopteri, Ixxviii ; 40, 45. 



Accipitres, lii, liv. 



Acherontia atropos, 73) 7^> 79- 

 \Acranial Vertebrata, xsxiii, Ixxxiv. 



Actinia, 158. 



Air-bladder, Ixxv ; 41, 43. 



Air sacs, 16. 



Agassiz, xxiii. 



Alae cordis, cv, cxx ; 10 1. 



Albumiuiparous gland, 50, 190. 

 ~ Allantoid bladder, 183. 



Allantoidea, xl, xli. 



Allman, 70, 72. 



Ambulacral system, cxlvii ; 141. 



Amniota, xxxix, xl. 



Amphibia, Ixv-lxvii ; 181-185. 



Amphidiscs, 163. 



Ampbinomidae, accessory nerve system 

 of, 123. 



Amphirrhina, Ixxviii. 



Amphisbaenoidea, Ivii. 



Ampullae of feet in Echinodemiata, 

 141, 144. 

 "^ Anallantoidea, xli. 



Animals, characters of, as opposed to 

 Vegetables, clxii. 



Annelides, 119. 



Annulata, cxxii, cxxvii ; 138. 



Annuloida, cxxiii. 



Anodon, 54-66. 



Antedon rosaceus, 157. 



Antennae, homologies of, 75. 



Antennules, 91. 



Anthozoa. clviii; 152. 



Anticlinal vertebra, 7. 



Aorta of Mammals, xlv ; 168. 



— of Birds, xlix ; 176. 



— of Reptiles, lix. 



Botalli ductus. 

 Aorta of Fishes, Ixxii. 

 Aphis, 109-113. 

 Aphrodite, 122. 

 Apteryx, liv, Iv. 

 Apus, III. 

 Acarina, cxviii. 

 Arachnida, cxvi ; 110,115. 

 Archaeopteryx, 1. 

 Arion, 190. 

 Armadillo, xliv. 

 Arthropoda, civ ; 73,119. 

 Ascidia, c ; 66-71. 

 Aspidochirotae, 147. 

 Astacus, 90-119. 

 Asterias, 141-145, 223-229. 

 Asteriae, cliii. 



Asteroidea, cliii ; 141-145, 223-229. 

 Astropecten, 145. 

 Aulostoma gulo, 128, 130. 

 Auriculae of Echinoidea, homology of, 



clii. 

 Autolytus, 137. 

 Autophagi, Iv. 

 Aves, xl-xli.v, lix, Ix ; 175. 

 Axolotl, xlii. 

 Azygos nerve, 132. 

 — vein, 2, 171. 



B. 



Baer, v, xxi ; 65, 69. 



Barkow, 15. 



Bastian, Dr. Charlton, xvii ; 157. 



Bate, Mr. Spence, 94. 



Beneden, Van, 71, 119. 



Bipinnaria asterigera, 154. 



Bojanus, organ of, the renal organ of 

 Mollusca, Ixxxvi, xc, xciii, xciv, 

 xcvii, xcix ; ti4, 60-62, 64, 69, 

 67. 



Botalli ductus, 185. 



