1898—1902. No. 20.] BRACHIOPODS AND MOLLUSCS. 19 
Thracia truncata has not been previously found in waters north 
and west of Baffin Bay; though it should be stated that thracia obliqua 
JerFREYS, of which there is but one fossil valve from Grinnell Land, is 
possibly merely a deformed form of this species, as indeed I am in- 
clined to believe. 
Thracia septentrionalis, JEFFREYS. 
Locality: 
March 7. 1900. Bay south of Sjipélse Ness, Havnefjord, 30—40 m. Small stones 
slightly overgrown with laminaria. 
Two specimens measuring: 
Long. 20.5 mm. Lat. 14.5 mm. Crass. 7.5 mm. 
185 , 13.5, 6.5, 
The specimens are not so thick-valved and short as those taken 
by “Véringen” near Jan Mayen. They more closely resemble in these 
respects specimens from Norskéerne, Spitzbergen. 
Like the last-mentioned, thracia seplentrionalis has not been pre- 
viously found in the archipelago north af America. 
Pandora, kennerleyia, glacialis Leacu. 
Locality: 
Sept. 19. 1900. Off Forvisningsdalen, Gaasefjord, 4—40 m. Clay with small stones. 
Sept. 20. ,, The head of the Gaasefjord, 6—40 m. Clay with small stones. 
Aug. 2 1901. = _ _ , about 40 m. 
Aug. 16. , — = = , about 14 m. 
Of this species there are only six specimens, so that it seems to 
be scarce. 
The largest specimen measures: Long. 25.7 mm., Lat. 15.2 mm., 
Crass. 4.7 mm. In the smallest specimens these measurements are 
respectively 17.5 mm., 10.5 mm., and 2.5 mm. The epidermis of the 
right valve is marked with radiating lines, as may also be seen in the 
drawing of Lecue; though in the specimens collected by the Fram 
these are stronger and more distinct than they are in the drawing. 
When the shell is closed the margin of the left valve bends downwards 
over the right valve, while the margin of the latter bends upwards. 
The same will be found to be the case with several other molluscs such 
as pecten grénlandicus. When various authors assert that the margin 
of the left valve of this species projects slightly over that of the right 
valve, this is due in most cases to a strong contraction of the animal, 
resulting in the margin of the valve becoming bente. 
