6 JAMES A. GRIEG. [SEC. ARCT. EXP. FRAM 



Leda pernula, MULLER. 



Locality: 



Aug. 18. 1898. Bay near Rice Strait. 

 Aug. 26.. 



July 29. 1899. The winter harbour, Havnefjord, 18 m. 

 Sept. 9. , 16 m. 



July 26. 1900. West side of the entrance to Stordalen, Havnefjord, about 20m. Clay. 



Sept. 19. Off Forvisningsdulen, 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. 10. , 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- 

 mens subjected to careful examination longitudinal rib 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 length and the breadth (thickness) 

 22.8636.12 % of the length. In leda minuia the height of the 

 shell is 56.25 58.33 /o of the length, and the breadth 32.1445.45 of 

 the length. 



Leda minuta, MULLEK. 



Local i t y : 



Aug. 18. 1898. Bay near Rice Strait. 

 Aug. 26. 



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

 Sept. 22. , 16 m. 



March 7. 1900. Bay south of Sjopolse Ness, 3040 m. Small stones slightly over- 

 grown with lammariu. 



July 25. The winter harbour, Havnefjord, about 20 m. Rocks and stones. 

 Sept. 20. The head of the Gaasefjord, 640 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. 

 16.5 9.5 6.5 



Yoldia, portlandia, arctica, GRAY. 



Locality: 



Sept. 19. 1900. Off Forvisningsdalen, Gaasefjord, 440 m. Clay with small stones. 

 Sept. 20. The head of the Gaasefjord, 640 in. Clay wih small stones. 

 Aug. 2. 1901. , about 40 m. 



Aug. 2. . 24 m. Soft brown clay with small 



Aug. 16. , about 14 m. [stones and sand. 



