176 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
bottom (forty fathoms), where the water was 41.2° as against 43.2° a 
month later. Station 10058 was about 2.5° warmer than the Cape Cod 
stations down to twenty fathoms; but at thirty fathoms it was about 
5° colder (41.1°); with a minimum of 40.6° at sixty fathoms, below 
which it warmed slightly; and its curve is almost exactly parallel 
with that of the nearest August Station (10085), though about 3° 
warmer at all depths. 
The water on the southwestern part of George’s Bank (Station 
10059) was nearly uniform from the surface downward, in tempera- 
ture as well as in salinity (p. 188). 
Mean temperature. If all the temperature curves in the Gulf were 
parallel, a direct comparison between them would show which regions 
were potentially warmest, which coldest. But they are so distorted 
by greater or less active vertical circulation, that it is only by calcu- 
lating the mean temperatures for each station that light can be 
obtained on this subject. The mean temperatures for the zone be- 
tween the surface and the fifty fathom level are given in the following 
table:— 
Station Mean tem. Station Mean tem. 
10087 46 .3° 10096 50.2 
10088 49 4° 10097 50.3° 
10089 47° 10100 48 .4° 
10090 47..5° 10101 49° 
10091 50° 10102 AGP ie 
10092 46 .5° 10103 48 .4° 
10093 50° 10104 47 .2° 
10094 Ai ile 10105 AT 
The mean between the surface and forty fathoms, was 46° at Station 
10057; 48.5° at Station 10086; 48.8° at Station 10106; the thirty 
fathom mean was 47.6° at Station 10095; 55° at Station 10059. Thus 
the upper fifty fathoms was coldest, as a whole, on the western side 
of the Gulf. Passing northeastward along the coast, the mean tem- 
perature rose from 46.3° near Cape Ann to 48.4° off Cape Elizabeth, 
49° off Penobscot Bay, 48.4° off Mt. Desert Rock and 50.3° over the 
northern end of the basin. In the centre of the Gulf it was generally 
49°-50°, except for one cold Station (10092). Off the mouth of the Bay 
of Fundy the mean (50.3° at Station 10096) was as high as anywhere in 
the Gulf. But the upper fifty fathoms over the slope of German Bank 
(Station 10094), and the whole column of water on the Bank itself 
