definition of, [114];

of the soma, [154].

Degeneration of organs, see Atrophy.

Detmer, on transmission of acquired characters in plants, [390].

Development amongst Protozoa, [149].

Diatomaceae, fission of, [65].

Dicyemids, [131], [141].

Diptera, length of life of, [42];

pole cells of, [197], [206], [210], [216];

as fertilizers of flowers, [309].