Fatiot, Amphibia of Upper Engadine, 616.
Fechner, on conscious matter, 714.
Filippi, De, _Triton alpestris_, 585.
Forel, Prof., fresh water _Pulmonifera_, 590.
Form-relationship and blood-relationship, not always coincident, 395.
Frantzius, Von, on climate of Mexico, 619.
Frogs, 615, 616, 618;
inedible species, 294.
Function, change of, 365.