AARD-VARK 
Aard-wolf 
Abdominal pores 
" riks 
Abducens nerve - 
Abomasum - 
Acanthocephala - 
Acanthopteri 
Acarina 
Acetabulum 
Acineta 
Acinetaria - 
Acipenser 
Acorn-barnacle 
Acrodont teeth 
Acromion 
Actinia 
Actinophrys 
Actinozoa, - 
Adambulacrals 
Adhesive cells 
Adrenal body of rabbit 
f®luroidea - - 
4Erial adaptation of mammals 
Afferent branchials, skate 
Air-bladder of fishes - 
Air-sacs of birds - 
Albumen gland of snail 
u of bird’s egg 
nu of frog’s egg 
Albuminal nutrition of Verte- 
brata 
Alcyonium - 
Alecithal 
Alimentary system 
Alimentary system of verte- 
brates - 
" u of mammals 
Alisphenoid canal 
Allantois  - 
Allantoic placenta 
Alligators 
Allotheria 
Alpaca - 
Alternation of generations 
Alula - 
Amblypoda 
Ambulacra - : 
Ambulacral ossicles 
Ametabolic : 
Amitosis 
Ammoccetes 
Ammonites 
Ammnion 
Amniota 
Ameoeba 
Amphibia 
Amphiblastula 
Amphilestes - 
Amphineura (see Isoplenra) 
Amphioxus - - 
Amphioxus, development of 
Ampullee of starfish 
Anacanthini 
Anal cerci of cockroach 
Anal glands, starfish 
