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Hermaphroditism, of embryos; in fishes. Herodias bubulcus, vernal moult of. Heron, Sir R., on the habits of peafowl. Herons, love-gestures of; decomposed feathers in; breeding plumage of; young of the; sometimes dimorphic; continued growth of crest and plumes in the males of some; change of colour in some. Hesperomys cognatus. Hetaerina, proportion of the sexes in; difference in the sexes of.
Nobody but the Butterfly Man grumbled at this springlike balminess, and he only because he was impatient to resume experiments carried over from year to year the effect of varying degrees of natural cold upon the colors of butterflies whose chrysalids were exposed to it. He generally used the chrysalids of the Papilio Turnus, whose females are dimorphic, that is, having two distinct forms.
For example, the comb and wattles of Gallus are sexually dimorphic, being in the original species larger in the cock than in the hen. There is no convincing evidence that these appendages are either for use or ornament. They are, in fact, a disadvantage to the bird, being used by his adversary to take hold of when he strikes.
Wallace, for instance, describes a certain butterfly which presents in the same island a great range of varieties connected by intermediate links, and the extreme links of the chain closely resemble the two forms of an allied dimorphic species inhabiting another part of the Malay Archipelago.
Canestrini draws the same conclusion from the fact that the males of certain species present two forms, differing from each other in the size and length of their jaws; and this reminds us of the above cases of dimorphic crustaceans. Aug. In this species, as I may add, the male is testaceous and the female black with legs banded with red.
With hybrids raised from the same seed-capsule the degree of sterility is innately variable, so it is in a marked manner with illegitimate plants. Lastly, many hybrids are profuse and persistent flowerers, while other and more sterile hybrids produce few flowers, and are weak, miserable dwarfs; exactly similar cases occur with the illegitimate offspring of various dimorphic and trimorphic plants.
And, with reference to the period at which the power of reproduction is gained, it is a remarkable fact that various birds occasionally breed whilst retaining their immature plumage. I have noticed the following cases in Audubon's 'Ornith. Blyth informs me that certain herons apparently are dimorphic, for white and coloured individuals of the same age may be observed. Blyth and Mr.
But sometimes these dimorphic species are seen to revert to the primary condition, developing a fertile cone at the summit of the green summer-stem. I have had the opportunity of collecting an instance of this anomaly on the tall Equisetum telmateja in Switzerland, and other cases are on record in teratological literature.
She was a big butterfly, big even for the greatest of Carolina swallow-tails; not the dark dimorphic form, but the true Tiger Turnus itself, her barred yellow upper wings edged with black enamel indented with red gold, her tailed lower wings bordered with a wider band of black, and this not only set with lunettes of gold but with purple amethysts, and a ruby on the upper and lower edges.
The infertility which may be observed in various dimorphic and trimorphic plants, when they are illegitimately fertilised, that is by pollen taken from stamens not corresponding in height with the pistil, differs much in degree, up to absolute and utter sterility; just in the same manner as occurs in crossing distinct species.