136 
arrears was still very heavy. It was resolved that in future no 
issue of the Society’s “Transactions” should be made to 
Members in arrears with their subscriptions. 
At the request of the President, Professor Harker read a 
Preliminary Note “on the Development of the Frog,” made 
during the past term in-the Biological Laboratory of the Royal 
Agricultural College at Cirencester. The eggs were taken early 
in March, at the time when the glutinous coating showed that 
they were but newly spawned. Experiments were also made 
with eggs taken from the gravid female, with a view to 
artificially fertilising them. These had to be further worked 
out. Specimens of the eggs from the separate lots were taken 
daily, and hardened for section-cutting. The external appear- 
ances each day were noted, and these, on the completion of the 
paper, would be compared with the internal changes revealed 
by sections. The points to which special attention had been 
given were the segmentation of the yolk, the appearance of the 
notochord, and its subsequent development; the growth of the 
external branchice and their subsequent absorption, the opening 
of the mouth and anus, the appearance of the eyes, the growth 
of the limbs, and the change in character of the intestines 
Several interesting experiments were stated to be still in pro- 
gress on the growth of the Tadpole when supplied with 
abundant or limited amounts of food, and on the power of 
sight, and dates of increasing susceptibility to light. A short 
account of the literature of the subject and a promise of 
further results were given. 
This Paper was followed by one prepared by the Rev Dr 
Smuitue, of Churchdown; and, in his absence, read by the Rev 
E. Cornrorp, on the “Occurrence of the Mineral Vivianite in 
the Cotteswold.” Towards the close of the previous year, the 
mineral in question had been detected by the writers amongst 
a number of fossils and other natural objects sent for deter- 
mination by a young friend from the neighbourhood of Stroud. 
The writer gave a description of the properties and qualities of 
Vivianite, to which he appended some historical information 
concerning the mineral and its artificial reproduction in the 
nes ee ee ee 
