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Supra-condyloid foramen in the early progenitors of man. Suspicion, prevalence of, among animals. Swallow-tail butterfly. Swallows deserting their young. Swan, black, wild, trachea of the; white, young of; red beak of the; black-necked. Swans, young. Swaysland, Mr., on the arrival of migratory birds. Swifts, migration of.

Dujardin, on the relative size of the cerebral ganglia, in insects. Duncan, Dr., on the fertility of early marriages; comparative health of married and single. Dupont, M., on the occurrence of the supra-condyloid foramen in the humerus of man. Durand, J.P., on causes of variation. Dureau de la Malle, on the songs of birds; on the acquisition of an air by blackbirds.

At this or some earlier period, the great artery and nerve of the humerus ran through a supra-condyloid foramen. The intestine gave forth a much larger diverticulum or caecum than that now existing. The foot was then prehensile, judging from the condition of the great toe in the foetus; and our progenitors, no doubt, were arboreal in their habits, and frequented some warm, forest-clad land.

Broca, Prof., on the occurrence of the supra-condyloid foramen in the human humerus; anthropomorphous apes more bipedal than quadrupedal; on the capacity of Parisian skulls at different periods; comparison of modern and mediaeval skulls; on tails of quadrupeds; on the influence of natural selection; on hybridity in man; on human remains from Les Eyzies; on the cause of the difference between Europeans and Hindoos.