Agalma, [300], [307]

Agalminae, [307]

Agaricia, [403]

Agaricoides, [350]

Agassiz, [258], [312], [319];

on classification of Endocyclica, [533];

of Clypeastroidea, [548]

Aggregate, formation, in Microgromia, [59];

social, of Vorticella, [158];

(rosette) of Treponema, [120]