6 .IAMKS A. GRIEG. [SEC. ARCT. EXP. FRA.M 



Leda pernula, MULLER. 

 Locality: 



Aug. IS. 1898. Bay near Hire Strait. 



Ang. 26. 



.Inly 29. is'.l'.l. The winter harbour, Havnefjord, 18 m. 



Sept. 9. .. . 16 m. 



.Inly -26. I 1 . 100. \Vesl side of the entrance to Stordalen. Havneljord. about 20m. Clay. 



Sept. P.I. 01T Forvisningsdalen. Gaasefjonl. 4 40 in. Clay with small stone-. 



Sept. 20. .. The head of the Gaasefjord. 6 40 in. Clay with small stone-. 



An-. 2. 1901. , about 40 m. 



Ang. 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. BECK. In the speci- 

 men- subjected to careful examination longitudinal rih on the inner side 

 of the shell is well-developed, concentric striation is tine, shell is extre- 

 mely thin and fragile. 



The largest specimens have a length of 26 27.5 mm., height 

 13 14 mm., and hreadth 7.5 8.5 mm. In the 25 specimens the height 

 of the shell is 47.27 56.67 of the length and the hreadth (thirkne--! 

 22.8636.12 % of the length. In leda in i unfa the height of the 

 -hell is 56.25-58.33% of the length, and the hreadth 32.1445.45 ,f 

 the length. 



Leda minuta, ML T LLEH. 



Local i t y : 

 Ang. 18. 1898. Bay near Rice Strait. 



Aug. 2t;. .. 



.Inly 29. 1899. The winter harbour, Havnefjord, 12 m. 

 Sept. 22. , 16 m. 



March 7. 19110. Hay south of Sjopolse Ness, 30 40 m. Small stones slightly over- 

 grown with laminaria. 



July 25. Tin- winter harbour, Havneljord. about 20 m. Rocks and stone-. 



Sept. 20. The head of the Gaasefjord, 6 40 m. Clay with small stone-. 



.Inly 9. 1901. Henhngteii. 



The species seems to he extremely scarce, since at no locality were 

 more than one or two specimens found. The largest specimen measure: 

 Loiii;. IS mm. Lat. 10.5 mm. Crass. 7.5 mm. 

 16.5 .. !l.5 6.5 



\olilin. jiortlandia, arctica, (HIAY. 

 Locality: 



-pi. P.I. P.HIO. ( Ml' |-'oi \ isiiingsdalen, (uiasefjord, 4 40 m. Clay with small stone-. 



Sept. 20. I lie head of tin' C aa se f jon 1 , 6 -40 in. Clay wih small stone-. 



Ang. 2. P.inl. . about 40 in- 



Aug. 2. .. . 21 in. Soil Krown clay with -mall 



Aug. Hi. . about 14 m. [stones and sand. 



