19 
ing of edible sea-fish in our local waters. Mr. Scott 
carried on the work in the boat-house at Piel, in order to 
test the water of the Barrow Channel, while I repeated 
the experience of the previous Easter at Port Erin in 
the south-end of the Isle of Man. 
About the middle of April the Sea-Fisheries steamer, 
John Fell,’ came to Port Erin under the direction of 
Mr. R. A. Dawson, for the purpose of searching for 
spawning fish. On Saturday, April 17th, we trawled 
mature fish of various kinds both flat and round, but did 
not succeed in getting both males and females of the same 
species in the ripe condition, and consequently no eggs 
were fertilized. On Monday, April 19th, we were more 
fortunate, and obtained to the north-west of Port Erin 
Lemon Soles and “ Witches” spawning, and were able 
to fertilize the egys. We also found spawning Megrims 
(Arnoglossus laterna), and, as an experiment, we fertilized 
the eggs with the milt of a ripe Cod. Asa result large 
numbers of the following embryos were started on their 
development in the Aquarium on the afternoon of the 
19th :— 
In tank I.—lLemon Soles (Pleuronectes microcephalus). 
In tank I1.—‘‘ Witches” (Pleuronectes cynoglossus). 
In tank I11.—Ova of Megrim fertilized by mult of Cod. 
The arrangement of the hatching tanks, and the 
apparatus for the circulation of the water was described 
and illustrated in last year’s Report.* The water during 
the hatching kept at a specific gravity of from ‘26 to ‘27 
and at a temperature of from 46° to 47° Fahr. The cross 
between the Megrim (a flat fish) and the Cod only 
developed for from three to four days, and then all the 
embryos became abnormal and distorted, and died. 
* See also Trans. Biol. Soc., vol XI., p. 67 and Pls. I,—IY. 
