COMMITTEE B — DECEMBER 1903 ( 34 ) 
English trawlers, who attribured the fact to the results of the marking experiments 
(a specimen was exhibited which Dr. Hencxe and others stated, however, was merely 
an abnormal fish). Perhaps the simplest plan of preventing overlapping in their 
experiments would be for the members to communicate the locality of their ex- 
periments either beforehand, or as soon as possible afterwards. 
Prof. Gizson thought: that many marked fish had been overlooked, since he 
had been able to purchase them at fishmongers’ shops. They would be difficult to 
distinguish when fish were sorted at night. In Belgium they were chiefly marking 
rays and soles. 
Dr. TryBom said that in Sweden they had marked 1,144 plaice altogether. 
Many had been recaptured during the first few months, but out of 653 marked in 
April last only 19 had been recovered so far as he was aware. 
Dr. Petersen stated that in April 1,151 plaice were marked in the North 
Sea from the “Thor”, and 29 °/o had been recovered to the end of October, mostly 
in April and May. In Skagerak 69 plaice were marked in August last, and 14 (i.e. 
20°/o) had been recaptured by the end of October. He had not yet worked out 
the results. 
Dr. Henwcxe stated that he had only got back 7 to 8% of his marked 
fishes, and perhaps the kind of label used was accountable for the small percentage. 
He described his new labels (a black guttapercha stud) but stated that he had not 
yet released any fishes marked with them. 
In reply to a question, Dr. Hrmere added that he did not think his new 
label was liable to escape the notice of fishermen, since on the white side of the 
fish it was very conspicuous, and on the dark side the sharp point, though liable 
to be overlooked, would readily be felt. 
Dr. Repexe said that he had begun work in March with soles, and more 
than 500 plaice and soles had been marked altogether, but not many had been 
recaptured. 
Dr. Fuzron stated that about 10 or 19%, of the marked fish liberated in his 
experiments ten years ago had been recovered, and of those marked with aluminium 
not one had been returned. It was found that some had remained stationary and 
the larger fish had travelled a long way up the coast against the prevalent current. 
He asked whether it would not be advantageous to mark other species. 
