partial, [238];

explanation of, [243];

male, [247];

of Cynips, [273];

not perpetual, [283], [285].

Pasimachus, length of life of, [48].

Pemphigus terebinthi, length of life of, [41].

Petromyzon, impregnation of, [175], [247];

polar bodies of, [218].

Pfeffer, on chemical attraction of oosphere, [247].