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Increased size must be in some manner of more importance to the females, than strength and size are to the males for fighting with other males; and this perhaps is to allow of the production of a vast number of ova. Callionymus lyra. Upper figure, male; lower figure, female. In many species the male alone is ornamented with bright colours; or these are much brighter in the male than the female.
Callidryas, colours of sexes. Callionymus lyra, characters of the male. Callorhinus ursinus, relative size of the sexes of; courtship of. Calotes maria. Calotes nigrilabris, sexual difference in the colour of. Cambridge, O. Pickard, on the sexes of spiders; on the size of male Nephila. Camel, canine teeth of male.
Kent, W.S., elongation of dorsal fin of Callionymus lyra; courtship of Labrus mixtus; colours and courtship of Cantharus lineatus. Kestrels, new mates found by. Kidney, one, doing double work in disease. King, W.R., on the vocal organs of Tetrao cupido; on the drumming of grouse; on the reindeer; on the attraction of male deer by the voice of the female.
Gunther, Dr., on paddle of Ceradotus; on hermaphroditism in Serranus; on male fishes hatching ova in their mouths; on mistaking infertile female fishes for males; on the prehensile organs of male Plagiostomous fishes; spines and brushes on fishes; on the pugnacity of the male salmon and trout; on the relative size of the sexes in fishes; on sexual differences in fishes; on the genus Callionymus; on a protective resemblance of a pipe-fish; on the genus Solenostoma; on the coloration of frogs and toads; combat of Testudo elegans; on the sexual differences in the Ophidia; on differences of the sexes of lizards.
There is reason to suspect that many tropical fishes differ sexually in colour and structure; and there are some striking cases with our British fishes. The male Callionymus lyra has been called the gemmeous dragonet "from its brilliant gem-like colours."
In the male the basal margin of the anal fin is also a little produced and dark coloured. Gunther, is striped with bright colours. This filament does not contain any muscles, and apparently cannot be of any direct use to the fish. As in the case of the Callionymus, the males whilst young resemble the adult females in colour and structure.
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