REPORT OF THE COUNCIL. 427 
papers by Miss Lebour dealt with the life history of the sea-spider 
Anaphia petiolata, the Jarvee of which are carried about by meduse, 
and also recorded the fact that medusz act as hosts for larval 
Trematodes, the adult form of the worm found in the jelly-fish being 
known to occur in the mackerel. 
A paper by Mrs. Sexton and Miss Wing gave an account of a 
lengthy series of experiments on the inheritance of eye-colour in the 
Amphipod Gammarus chevreuai, which was found to be in accordance 
with Mendel’s law. 
During the year the Director has completed a report upon the post- 
larval stages of fishes collected off Plymouth in 1914. A number of 
interesting stages not previously known have been found. 
The experiments on the growth of the scales of fishes kept in the 
Laboratory tanks under different conditions, especially as regards 
temperature, were continued until the autumn of 1916. The material 
is being examined and reported upon by Mr. D. W. Cutler. 
Mrs. Matthews’ experiments on the rate of growth of fishes kept in 
the Laboratory and fed with food of different kinds have been continued 
and extended, and a considerable number of data have been brought 
together, which will, it is hoped, yield results of importance. 
Mr. Matthews, working half-time, has completed his determinations 
of Phosphoric Acid in the sea off Plymouth. The results extend over 
a period of sixteen months, showing a large seasonal variation, and 
will be published in the next number of the Journal. He has also 
continued his experiments on the methods of determining nitrates in 
sea-water. The other half of his time has been given to investigations 
into cerebro-spinal meningitis for the Medical Research Committee, the 
chemical work being carried out in the Laboratory of the Association. 
Miss M. VY. Lebour has carried out for a complete year the periodical 
examination of the micro-plankton found at the mouth of Plymouth 
Sound. The material has been obtained by centrifuging samples of 
sea-water taken at different depths, and the results have been worked 
out quantitatively. At the same time samples of plankton taken with 
ordinary silk tow-nets have been examined. Miss Lebour’s work has 
added greatly to our knowledge of the smallest plankton organisms 
and many new records have been obtained, especially amongst the 
Peridinide., A full account of this work has been prepared for 
publication in the Journal. 
