Crab, shore, habits of.
Crabro cribrarius, dilated tibiae of the male.
Crabs, proportions of the sexes in.
Cranz, on the inheritance of dexterity in seal-catching.
Crawfurd, on the number of species of man.
Crenilabrus massa and C. melops, nests, built by.
Crest, origin of, in Polish fowls.
Crests, of birds, difference of, in the sexes; dorsal hairy, of
mammals.
Cricket, field-, stridulation of the; pugnacity of male.
Cricket, house-, stridulation of the.
Crickets, sexual differences in.
Crinoids, complexity of.
Crioceridae, stridulation of the.
Croaking of frogs.
Crocodiles, musky odour of, during the breeding season.
Crocodilia.
Crossbills, characters of young.
Crosses in man.
Crossing of races, effects of the.
Crossoptilon auritum, adornment of both sexes of; sexes alike in.
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