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 repre- 
sented 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 hemastoma 
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 estab- 
lished itself on the outside of the shell, on which it forms a protective 
coating. Helix superba has also a similarly green protective coat- 
ing, rendering it less visible to passing birds.”’ 
The following papers were read :— 
