Atorella, [314], [322]

Atrophy, of oral apparatus of Ciliata during conjugation, [151]

Attached, Foraminifera, [64];

Flagellata, [112] f.;

Ciliata, [152];

Suctoria, [160] f., [162]

Attachment, temporary, of Stentor, [155];

permanent, of Rhizocrinus, [591];

of Bathycrinus, [591];

of young Pentacrinidae, [592];