180 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
western slope of Jeffrey’s Bank. But it gradually receded from the 
surface, passing toward the northeast, the curve of 42° dipping from 
thirty fathoms at Station 10087 to forty fathoms at Station 10089, — 
and to the bottom, in about sixty fathoms, on the slope of the Bank. 
And there was no water as cold as 42° on the northeast side of the 
bank. Whether the 42° water was underlaid by warmer water in the 
> ay ea aah ALIKE 89 
10 65 OL i 
. 50° 
Ne SS 4 
30 StS SS, eae! = 
——_— eee 
ry ar zit aE oe 
60, 7 
Yes 
vo o nee 
7 eee 
" y 
ZT YY 
130 Z Y 
a Z 12 L, 
ee 
. 22.— Temperature profile running northeastward from off Cape Ann 
ya a 10087) toward Platt’s Bank to Station 10089. 
northern. end of the western basin, as it was further south (Station 
10088), is uncertain; but this was probably the case. 
Profiles running off shore from the western side of the Gulf further 
delimit the 42° water. The first of these, from the trough between 
Jeffrey’s Ledge and the mainland (Station 10104) to the centre of the 
