INDEX 



Aard-vark, 535. 



Abactinal end, of starfish, 158. 



Acanthias vulgaris, 366. 



Acanthin, 31. 



Acetabulum, 342; of frog, 416, 



Aciculum of Annelids, 190. 



Acineta, 5.1. 



Acmeea tesludinalis, 292. -^^ 



Acrania, 323. 



Acromion process, 500. 



Actinobolus, 49. 



Actinomma asteracanthion, 32. 



Actinophrys sol, 26. 28. 

 - ActinosphEerium, 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. 



Ambulacra! pores, 161. 



Ambulacrum, 160. 



Amnion, 434. 



2N 



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



teus, 14. 

 Amphieoelous vertebras, 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 scrophulariae, 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 



545 



