194 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
tucket Shoals (Station 10060) to the edge of the continental slope 
(Station 10061), shows that the water was much salter south than north _ 
of the Shoals, early in July. In the southern part of the Gulf there was 
comparatively little increase in salinity with depth below thirty fath- 
oms, and the bottom salinity was about the same on the Shoals as at 
the same depth further north; but the surface shows the influence of 
the salter southern water by a steady, though slight; rise in salinity 
from Station 10058 to Station 10060, as well as in the fact that the 
61 
Fu0 63 62 
Ne VT ET 
0 I I .. = 
60 7 ae 3 = | 
EE PE Uff MI ew» h. 
| es YG a - 
100 “ “Wy - 
Fig. 38.— Salinity profile from the neighborhood of Montauk Point across 
the continental shelf (Stations 10063, 10062, 10061) to the edge of the 
shelf south of Nantucket. 
average salinity for the upper ten fathoms was higher at Station 
10060 (32.65%po) than at Station 10058 (32.5%po). 
South of the Shoals there was a rapid rise in salinity, depth for 
depth, from north to south across the continental shelf. But the 
Shoals are an effective barrier to any active mixing of water on the 
two sides below about thirty fathoms. 
The next profile (Fig. 38) runs across the continental shelf from 
Montauk Point (between Station 10083 and Station 10087) to the 
continental slope south of Nantucket Shoals (Station 10061). Its 
