6 JAMES A. GRIEG. [SEC. ARCT. EXP, FRAM 
Leda pernula, Miter. 
Locality: 
Aug. 18. 1898. Bay near Rice Strait. 
Aug. 26. ,, _ _ : 
July 29. 1899. The winter harbour, Havnefjord, 18 m. 
Sept. %  , - _ _ , 16 m. 
July 26. 1900. West side of the entrance to Stordalen, Havnefjord, about 20m. Clay. 
Sept. 19, 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. 
At Rice Strait this species was quite common, whereas in Havne- 
fjord and Gaasefjord it was very scarce. 
The specimens belong to the variety costigera, Buck. In the speci- 
mens subjected to careful examination longitudinal mb on the inner side 
of the shell is well-developed, concentric striation is fine, shell is extre- 
mely thin and fragile. 
The largest specimens have a length of 26—27.5 mm., height 
13—14 mm., and breadth 7.5—8.5 mm. In the 25 specimens the height 
of the shell is 47.27—56.67 °/) of the Jength and the breadth (thickness) 
92.86—36.12 °/) of the length. In leda minuta the height of the 
shell is 56.25—58.33 °/, of the length, and the breadth 32.14—45.45 of 
the length. 
Leda minuta, Mi.u.er. 
Locality: 
Aug. 18. 1898. Bay near Rice Strait. 
Aug. 26. Ms - _ 2 
July 29, 1899. The winter harbour, Havnefjord, 12 m. 
Sept. 22. ,, _ - , 16 m. 
March 7. 1900. Bay south of Sjopolse Ness, 30 40 m. Small stones slightly over- 
grown with laminaria. 
July 2%  , The winter harbour, Havnefjord, about 20 m. Rocks and stones. 
Sept. 20. ,, The head of the Gaasefjord, 6—40 m. Clay with small stones. 
July 9 1901. Renbugten. 
The species seems to be extremely scarce, since at no locality were 
more than one or two specimens found. The largest specimen measure: 
Long. 18 mm. Lat. 10.5 mm. — Crass. 7.5 mm. 
165, 55, a 
Yoldia, portlandia, arctica, Gray. 
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 wih small stones. 
Aug. 2. 1901. = _ - , about 40 m. 
Aug. 2 4 _ — _ , 2-4 m. Soft brown clay with small 
Aug. 16. ‘S _ _ _ , about 14 m. [stones and sand. 
