Planariae, bright colours of some.
Plantain-eaters, colours and nidification of the; both sexes of, equally brilliant.
Plants, cultivated, more fertile than wild; Nageli, on natural selection in; male flowers of, mature before the female; phenomena of fertilisation in.
Platalea, change of plumage in.
Platyblemus.
Platycercus, young of.
Platyphyllum concavum.
Platyrrhine monkeys.
Platysma myoides.
Plecostomus, head-tentacles of the males of a species of.