Arthr"poda, evolution, [11]

Arthr"poda, excretory organs, [396], [418]

Arthr"poda, eyes, [75], [89]

Arthr"poda, giant-fibres, [489]

Arthr"poda, musculature, [411]

Arthr"poda, olfactory organs, [220]

Arthr"poda, resemblance to ancient fishes, [29]

Astacus, brain, [54]

Ast"cus, digestive ferment in cells lining the carapace, [442]

Ast"cus, optic chiasma, [101]