34 JAMES A. GRIEG. [SEC. ARCT. EXP. FRAM 
which Bereu has described in his work: “On the nudi-branchiate gaste- 
ropod Mollusca of the North Pacifik Ocean, with special reference to 
those of Alaska” (p. 89, tab. 1, fig. 18—20, tab. 3, fig. 7—12). How- 
ever, as has been already pointed out by Posse.t in ‘“Grénlands Bra- 
chiopoder og Bléddyr”’ the median tooth of dendronotus frondosus 
varies greatly both in form and denticulation. It can be short and 
broad with a slight denticulation as in this specimen, or the cutting 
edge may even be quite smooth (the variety dalli) or again it may be 
high and narrow and have numerous margial teeth. The lateral teeth 
too may vary in form and denticulation. 
Dendronotus frondosus is to be found as far north as Upernivik 
on the west coast of Greenland. On the east coast of America it is 
met with from Cape Cod to Labrador, and it is further known to occur 
in the Bering Sea and Bering Strait. On the other hand it has not 
previously been mentioned as occurring in the archipelago north of 
America. For further particulars regarding the distribution of dendro- 
notas frondosus I would refer to Opuner: “Opistobranchia and Ptero- 
poda”, where a very full account is given of the distribution of this 
species. 
Coryphella salmonacea, CovuTHovy. 
Locality: . 
Aug. 16. 1898. Reindeer Point, Foulke Fiord, 8 m. 
July 9. 1901. Renbugten. 
There are in all six specimens of this species, one being from 
Foulke Fiord. This and the two specimens from Renbugten were care- 
fully examined and were found to be typical coryphella salmonacea. 
The specimens from Renbugten have a length of 15—20 mm. The 
one from Foulke Fiord is about 25 mm. 
Nares found this species at Discovery Bay, Grant Land (Smrrx). 
Pteropoda. 
Limacina helicina, Pures. 
Locality: 
Sept. 5. 1899. The winter harbour, Havnefjord. Pelagic. 3 specimens. 
