30 
Three of the ray captured in haul III. are the largest 
we have taken in the Bay; they measured 54, 56, 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, 994 C. to 11°77 C.; 
Sea temperature at surface, 9°°4 C. to 1095 C.; 
Specific gravity at surface, 1:0258 to 1026; 
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 Plewrobrachia. 
(4.) Four hauls off the Isle od Marne 
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 
192 inches and the other 253 inches long. The latter 
weighed 4 lbs. 11 ozs, The others were smaller fish, and 
