286 THE SECRETARY ON ADDITIONS TO THE MENAGERIE. [Mar. 7, 



unites with the tendon of the fiexor 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 hamastoma 

 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 Jorms a protective 

 coating. Helix svperba has also a similarly green protective coat- 

 ing, rendering it less visible to passing birds." 



The following papers were read : — 



