415 
the vertical distribution of mauy species is far betler kiiown in these 
seas than iu the Atlantic, properly so called. Side by side witli these 
statements abont the vertical distribution some remarks have beeu 
added in another column. If these notes are put in qnotation marks 
they have been quoted from Jeffreys (1878—85), if not, they are by 
the author liimself. Where no remark has been added, it is either 
that I have found no trace of the species from the quoted stations 
in the museum or that they have been found mixed up with indi- 
viduals of the same species from other stations, so that it has been 
impossible to furnish details with regard to the number, size, and 
State of preservation of the species. 
I. North of the Hebrides to the Færoe-Isles. N. lat. 59 to 
N. lat. 61°. The stations 2 to 7 are from the „Ligthning“ Ex- 
pedition 1868; st. 58 from the „Porcupine“ Expedition 1869. 
t 
Depth at which 
the dead shells 
occurred. 
Bange of the 
living Molluscs 
in the North- 
East Atlantic. 
Bange of 
the living 
molluscs 
at the 
coasts of 
Norway 
etc. 
Bemarks. 
Pecten tigrinus, Miiller. 
St. 2. 170 fms. 
5—155 fms. B. M. 
i 
10-100 
Molleria costulata, Moller.. .. 
— — 
unknown 
2-60 
Rissoa striata, Adams. 
— — 
0-50 
0-50 
Pecten pes lutræ, Linné. 
St. 4. 530 fms. 
10-420 B. M. 
20-300 
— opercularis, Linné .. . 
— — 
5—100 B. M. 
5—100 
Mactra elliptica, Brown. 
— — 
5-75 B. M. 
5—50 
Venus casina, Linné. 
— — 
sublittoral 
10-60 
Acmæa virginea. Midler. 
— — 
sublittoral 
0-100 
The terms littoral and sublittoral are here used in this sense: 
littoral; a species which has its greatest abiindance in the tract 
between tide-marks or near the low-water mark, and which does 
not reach greater dopths than 10 to 50 fms. 
sublitto ral: a species with greatest abundance in the tract between 
the low water mark and the lowest limit of the plants, not reaching 
depths of more than 100 or (rarely) a few hundreds of fathoms. 
