6 P. T. CLEVE, DIATOMS FROM BAFFINS BAY AND DAVIS STRATIT. 
from Davis Strait and on the east-coast of Greenland. De 
Toni indicates in his Sylloge that our form lives at Java, 
but this is a result of a mistake, the author of the Sylloge 
having confounded my paper on the diatoms from the arctic 
sea with that on the pelagic diatoms from Java. In Baffins 
Bay a single specimen was found in the September-plankton 
off Bylot Island, but it was not very scarce in the plankton 
from Cumberland WNound. Fossil specimens have been met 
with in the Cyprina-elay (reputed interglacial) in Denmark 
and Holstein. It has never been observed in the North Sea. 
At present it seems me the most probable that it belongs to 
the Guilf-stream, by which it has been in single specimens 
conveyed to the Mediterranean, as well as to the seas around 
Greenland. 
Biddulphia aurita (LYNGB.) occurs rarely in a few samples. 
It is a true plankton-form. 
Chetoceros atlanticus CL. occurs sparingly in the samples 
collected in Baffins Bay, though found abundantly in the 
plankton of Davis Strait, collected in October. As to its 
distribution, it occurs in abundance in the northern Atlantic, : 
south of Iceland, also in the plankton of Behrings Sea. In 
the North-Sea and on the coast of Sweden it has also been 
observed, though sparingly. 
Chetoceros borealis BTW. occurs sparingly in most samples 
from Baffins Bay, its proper place being the northern At- 
lantic and its tributaries, as the North Sea. I have seen 
this species also in plankton from Ascension, Mediterranean, 
and from the antarctic regions. So far as we know for the 
present, it is a characteristic atlantic form. I have never 
found it in the Indian and Pacific Oceans. 
Chzetoceros contortus ScHörtt (Ber. d. Deut. Bot. Ges. 1895 
XIIT p. 44), OC. compressus Cr. (Bih. t. K. Sv. Vet-A kad: 
Handl. XX, 3, N:o 2 p. 12) occurs sparimgly among other 
species in the September- and October-plankton. The geogra- 
phical distribution is uncertain as it has been confounded 
with a very similar species, C. compressus LAUDER. It has 
been found on the west coast of Sweden and in the south 
western Baltic. 
Chetoceros curvisetus CL. was found in few specimens only 
in the October-plankton (from Davis Strait). It occurs on 
