INDEX 



Aard-vark, 535. 



Abactinal end, of starfish, 158. 



Acanthias vulgaris, 366. 



Acanthin, 31. 



Acetabulum, 342; of frog, 416. 



Aciculum of Annelids, 190. 



Acineta, 51. 



Acmaea tesludinalis, 292. 



Acrania, 323. 



Acromion process, 500. 



Actinobolus, 49. 



Actinomma asteracanthion, 32. 



Actinophrys sol, 26, 28. 



Actinosphaerium, 27, 28. 



Actinostome, 158. 



Actinozoa, 91, 114. 



Adamsia palliata, 123. 



Adelochorda, 311. 



Adrenals, of birds, 476; of frog, 427. 



Agalmopsis cara, 108. 



Air-bladder, 403. 



Air-sacs, of birds, 472, 477; of in- 

 sects, 248. 



Air-vesicles, 513. 



Albatross, 490. 



Alcyonaria, 118, 119. 



Alcyonium carneum.ng; palmatum, 

 119. 



Alisphenoid, 498. 



Allantois, 434. 



Alligator, 434, 438, 456 ; brain, 449. 



Alveolus, 504. 



Amaroucium, 320. 



Ambulacral groove, 160, 161. 



Ambulacral pores, 161. 



Ambulacrum, 160. 



Amnion, 434. 



Amoeba, 14, 19 ; polypodia, 18 ; pro- 



teus, 14. 



Amphicrelous vertebrae, 334. 

 Amphineura, 281. 

 Amphibia, 407. 

 Amphidiscs, 88. 

 Amphioxus lanceolatus, 323. 

 Amphistomum, 136. 

 Ampulla, 162. 

 Anemone, sea, 115, 117. 

 Anguis, 436. 



Animalcules, wheel, 178. 

 Annelida, 188, 191. 

 Annulata, 188. 

 Annuli of leeches, 203. 

 Anodonta cygnea, 265, 270, 273, 274 ; 



fluviatilis, 265; circulatory system, 



of, 276. 

 Anolis, 328. 

 Anomalurus, 541. 

 Anoplophyra, 49. 

 Ant-eater, 526, 531 ; scaly, 533 ; spiny, 



525. 527- 



Antedon, 175. 



Antelope, 526, 537 



Antenna, 219. 



Antennule, 219. 



Antlers, 537. 



Anthenea, 167. 



Anthophysa, 37. 



Anthrenus scrophularise, 245. 



Antipathes, 120. 



Ant, red, 253; neuter, 253; soldier, 

 253 ; worker, 253. 



Anura, 432. 



Anus, 46; of Antedon, 175; of star- 

 fish, 159 ; absent in starfish, 170; of 



2N 



545 



