Fis"es, ani"ent, dominance, [23]

Fis"es, ani"ent, eyes, [75]

Fis"es, ani"ent, head-shields. See Head-shields

Fis"es, ani"ent, pleural folds, [414]

Fissure, posterior, [43]

Fittest, survival of, [16], [34]

Flabellum, [359], [360], [362], [363], [366]

Folds, pleural, [410], [414]

Function of auditory organ, double, [358]

Funt"ion of lateral line sense-organs, [357]