110 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



Three of the ray captured iu haul III. are the largest 

 we have taken in the Bay; they measured 34, 36, and 48 

 inches respectively. Large mature plaice were, however, 

 not so abundant as they were on October 26th, and as the 

 trawling was interrupted by bad weather, only about 80 

 such fish were obtained. 

 Physical observations. 



Wind, strong from W.N.W. and N.W. ; 



Weather, unsettled, some rain ; 



Sea, choppy; 



Barometer, 30'5 in. 



Air temperature, 9°-4 C. to 11 7 C. ; 



Sea temperature at surface, 9 "4 C. to 10 o, 5 C. ; 



Specific gravity at surface, 1 , 0258 to 1'026; 



Transparency of sea, about 5 feet. 



Invertebrates taken . 



These were similar to those taken on October 26th. 

 Townettings only were taken on two hauls, but the organ- 

 isms captured were very few, principally Pleurobrachia. 



(4.) Four hauls off the Isle of Man. 



Several hauls with a 7-inch meshed trawl net were 

 made off the North end of the Isle of Man between Jurby 

 Point and Point of Ayre, the object being to obtain some 

 large mature plaice for the Port Erin Hatchery. 



The hauls were made in water of from 9 to 5 fathoms 

 in depth and about half-mile from the shore, the direc- 

 tion of the drags being towards Point of Ayre. The 

 ground was very rough, and the net caught three times, 

 and had to be hauled. Five plaice were caught in these 

 first three hauls. Two were large females, one being 

 19f inches and the other 23 inches long. The latter 

 weighed 4 lbs. 11 ozs. The others were smaller fish, and 



