194 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



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. E. 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 eggs. We also found spawning Megrims 

 (Arnoglossus laterna), and, as an experiment, we fertilized 

 the eggs with the milt of a ripe Cod. As a result large 

 numbers of the following embryos were started on their 

 development in the Aquarium on the afternoon of the 

 19th :— 



In tank I. — Lemon Soles (Pleuronectes microcephalics) . 



In tank II. — " Witches " (Pleuronectes cynoglossus) . 



In tank III. — Ova of Megrim fertilized by milt 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 Keport.* 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 Pis. I.— IV. 



