Ammo"œtes, thyroid, [192], [194], [196], [205], [213], [430]

Ammo"œtes, transformation, [18], [59], [125], [168], [193], [199], [200], [220], [227], [228], [287], [291], [304], [307], [309], [331], [336], [347], [349], [389], [445]

Ammo"œtes, velum, [228], [289], [298], [302]

Amœbocytes, [473]

Amphibia, [23], [345]

Amphioxus, [33], [407]

Amphi"xus, atrial cavity, [409]

Amphi"xus, branchial nephric glands, [426]

Amphi"xus, endostyle, [198], [212]

Amphi"xus, excretory organs, [389], [395], [477]