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Show 286 THE SECRETARY ON ADDITIONS TO THE MENAGERIE. [Mar. 7, unites with the tendon of the flexor longus hallucis-which is of great size, and takes origin from three fourths of the fibula; its very large tendon passes in a groove by itself (external to that of the flexor longus digitorum), and goes (after being joined by the tendon of the flexor longus digitorum) to the four outer toes. The tibialis posticus is of about the same size as the flexor longus digitorum. It arises from the head of the fibula and the fascia between it and the popliteus and between it and the flexor longus hallucis, with which it is closely connected. Its fleshy belly is visible in the middle of the back of the leg, the gastrocnemius having been removed. Its tendon passes in a groove behind the internal malleolus, beneath that of the flexor longus digitorum, and, passing to the edge of the foot, is inserted into the naviculare. The flexor accessorius et brevis digitorum seems to be represented by a small muscle which takes origin from the tibial side of the os calcis, and ends in two tendons, one of which is inserted into the second phalanx of the hallux, and the other into that of the index; while muscular fibres of what seems to be the same muscle are inserted into the deep flexor tendon common to the flexor longus digitorum and flexor longus hallucis. March 7, 1882. Prof. Flower, LL.D., F.R.S., President, in the Chair. The Secretary exhibited some living examples of Helix hcemastoma from Point de Galle, Ceylon, which had been forwarded to the Society by Mr. J. Wood-Mason, F.Z.S., of the Indian Museum, Calcutta. Mr. Wood-Mason, writing on the subject, had remarked that " this Snail lives on the C ocoa-nut Palms ; and it is interesting to find that the same Alga that is found on the trunks of the palms has established itself on the outside of the shell, on which it forms a protective coating. Helix superba has also a similarly green protective coating, rendering it less visible to passing birds." The following papers were read:- |