616 
Anamnia 
Anapophyses 
Anchitherium 
Anguillulidee 
Animals and plants 
Anisopleura 
Annelida 
Annulata 
Anodonta 
Anomalurus 
Ant-eaters 
Antedon 
Antennz 
Antennules- 
Anthropoid Apes 
Anthropoidea 
Anthropopithecus 
Anthropozoic group (Era) 
Antelope 
Antlers 
Ants - 
Ant-lions 
Anura - 
Apes - 
Aphides 
Apis - - 
Appendicular skeleton of 
Vertebrata 
Appendicularia - 
Appendix vermiformis 
Aptera 
Apteria 
Apteryx 
Apus - 
Aquatic adaptation of mam- 
mals : - 
Aqueductus Vestibuli 
Aqueous humor of eye 
Arachnida - 2 
Arboreal types of mammals - 
Archeeopteryx 
Archzeornithes 
Archenteron 
Archiannelida 
Archichorda 
Archiccelomata 
Archiccele 
Archiblast - 
Archipterygium of fishes 
Archizoic group (Era) - 
INDEX. 
PAGE 
432 | Arctogcea, mammals of 
396 | Arctogcean regions 
573 | Arctoidea 
155 | Areaopaca, chick 
10 | Areapellucida, chick 
283 | Arenicola 
238 | Argonauta 
237 | Argyroneta 
269 | Aristotle’s lantern 
603 | Armadillos- 
558 | Arterial arches of Verte- 
175. brata 
212 | Arterial system - - 
212 | Arthrobranchs of crayfish 
590 | Arthropoda, classes of- 
588 " general charac- 
592 ters of 
68 | Arthrostraca 
578 | Artiodactyla 
576 | Ascaris 
248 | Ascetta 
254 | Ascidia 
440 | Ascon type (of sponge) 
590 | Asexual reproduction - 
257 | Astacus 
249 | Asterias 
Asteroidea 
418 | Astragalus 
404 | Atavisms or reversions 
385 | Atlas vertebra, rabbit - 
257 | Atrial cavity (atrium) - 
361 | Atrioccelomic funnels - 
452 | Atriopore - * 288, 
242 | Atriozoa 
Auchenia 
549 | Auditory capsules of cranium 
411 | Auditory nerve 
409 | Auditory sacs, Vertebrata 
258 | Aurelia - 
537 u life history of - 
449 | Auricularia (of Holothuria) - 
449 | Aves - - 
133 | Axial sinus, starfish 
238 | Axial skeleton 
171 | Axis vertebra, rabbit 
170 | Axolotl 
50 | Aye-Aye 
50 
435 | BaBoons 
68 | Badger 
