Annelids, [61], [103]

Apes, anthropoid, [91]

Appetites, [137]

Arthropoda, [61]

Articulata, [61]

Beauty, perception of, [121]

Bible, [241]

Blastosphere, [44]

Brain, [64], [108]; of insects, [69]; vertebrates, [75], [85]; man, [96]. See also [Ganglion]

Cell, [34], [36]