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From the extreme variability of colour in the male of some species, for instance of Theridion lineatum, it would appear that these sexual characters of the males have not as yet become well fixed.
Those occurring on the James River are in the 37th degree of N. latitude, while the French faluns are in the 47th; yet the forms of the American fossils would scarcely imply so warm a climate as must have prevailed in France when the Miocene strata of Touraine originated. Astrangia lineata, Lonsdale. Syn. Anthophyllum lineatum.
Thecla rubi, protective colouring of. Thecophora fovea. Theognis, selection in mankind. Theridion, stridulation of males of. Theridion lineatum. Thomisus citreus, and Thomisus floricolens, difference of colour in the sexes of. Thompson, J.H., on the battles of sperm-whales.
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