Trochus zizyphinus, Linné .. 
Solen vagina, Linné..,...…. 
Pecten opercularis, Linné... 
Venus casina, Linné........ 
Venus fasciata, Da Costa..…. 
Amphidesma cornea, Poli…. 
Solen vagina, Linné........ 
Thracia papyracea, Poli .... 
Tectura virginea, Miller... 
Emarginula rosea, Bell .…. 
Trochus cinerarius, L....... 
Phasianella pulla, Linné .… 
Rissoa membranacea, Adams 
Cerithium tuberculatum, L.. 
reticulatum, Linné 
Thracia papyracea, Poli .…. 
Mactra, subtruncata Da Costa 
Cerithium reticulatum, L 
the dead 
. shells” 
occurred. 
Depth where 
of the living 
molluscs in the 
North-East 
Remarks. 
fms. 
St; 25... 374 
St, 26. 364 
offCape Sagres. 
45-58 
sublittoral 
0—10 
5—100 B.M. 
sublittoral 
sublittoral 
sublittoral 
sublittoral 
sublittoral 
sublittoral 
10—75 B.M. 
5—165 B.M. 
sublittoral 
litt. or sublitt. 
litt. or sublitt. 
Fragm., the greatest being 
30 mm. in length. 
» Valve". 
»Fragments". 
One little, probably sms 
specimen, and a fra 
»Young and dead shells". 
»Fragment". 
The named finding places for these molluscs are all .situated 
on the slope off the west-coast of the Iberic Peninsula. The bottom 
descends here very rapidly to great depths. 
100 fathom line is generally very short: 
from St. 11, 17; 17a, 24.95:  5%0 10' miles, 
from St. 16, 22, 26, 28a: 
The distance to the 
10 to 20 miles. 
It can be added that also the ,,Challenger" and the ,,Travailleur" 
have dredged shallow-water shells at great depths west of the 
Iberic Peninsula. AÅ few examples may here be given; 
