426 
The dead shells have been dredged on the slope from ofF Nova 
Scotia to ofF Cape Batteras. 
Range of the living 
molluscs in the 
North -West 
Atlantic. 
Depths where only 
dead shells were 
found. 
Buccinum undatum, L. 
5—123 fms. 
142-843 fms. 
Neptunea decemcostata, Say ... 
ca. 10—100 
— 
322 - 
Aporrhais occidentalis, Bech . .. 
10-349 
— 
1000 — 
Panopæa norvegica, Spengl. 
10-300 
— 
506 — 
Cyprina islandica, L. 
5—128 
— 
130—349 - 
Astarte castanea, Say. 
0—100 
— 
142-435 - 
Venericardia granulata, Say.... 
7—250 
— 
435 - 
Nucula proxima, Say. 
3-302 
— 
310—517 - 
Mytilus edulis, L. 
0-57 
— 
1608 — 
Modiola modiolus, L. 
0—115 
— 
202 - 
Pecten islandicus, Miill. 
ca. 5—125 
— 
ca. 125—194 — 
— clintonius, Say. 
9—146 
— 
349-813 — 
Professor A. E. Ver rili says the following about the slope 
where these shells occurred^): „Bevond the 100-fathom line the 
bottom descends rapidlj to more than 1200 fathoms, into the great 
ocean basin, thus forming a rapidly-sloping bank, usually as steep 
as the side of a great mountain chain and about as high as Mount 
Washington, IS'ew Hampshire. This we call the „Gulf Stream Slope“, 
because it underlies the inner portion of the Gulf Stream all along 
our coasts, from Cape Hatteras to Nova Scotia. In our explorations 
a change of locality of less than 10 miles, trans verse to the Slope, 
would sometimes make a difference of more than 3500 feet in 
depth“. 
A. E. Ver rili; „Physical Characters of the Portion of the Continental 
Border, beneath the Giilf Stream, explored by the Fish-Hawk, 1880— 
1882“. Annual Keport of the Commissioner of Eish and Pisheries for 
1882. Washington, p. 1047. 
