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



respectively. In specimens from Spitzbergen I have found the numbers 

 to be 2226/1622. According to TORELL they are 29/23. In speci- 

 mens from the Siberian Polar Sea LECHE found 23/14 teeth. KRAUSE 

 found 21/13 teeth in a specimen 31 mm. long from the Bering Sea. 

 According to POSSELT moreover yoldia hyperborea may have as many 

 as 38/32 teeth. 



The largest specimens measure: 



Rice Strait Long. 34.5 mm. Lat. 17 mm. Grass. 9.5 mm. 



31.5 16 8.5 



Gaasefjord 29 15.5 9 



26 14.5 7.5 



A right valve from Gaasefjord had a length of 31 mm. POSSELT 

 gives the maximum size of this species as 45 mm. 



Yoldia hyperborea is not mentioned by either POSSELT or HAGG, in 

 their treatises on the distribution of this species, as occurring in waters 

 north of America. But as has been already remarked by TORELL it must 

 be this species which under the name of nucula sapotilla REEVE 

 mentions as occurring in the Wellington Channel. 



Mytilus edulis, LINNE. 

 Locality: 



July 20. 1898. Egedesminde. 

 July 30. Godhavn, about 6 m. 



The largest specimen has a length of 78 mm. 



Modiolaria laevfgata, GRAY. 

 Locality: 



Aug. 18. 1898. Camp Clay, Cape Sabine, 4 10 m. 



Aug. 24. Bay near Rice Strait. 

 Aug. 26. 



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

 Sept. 22. ,16 m. 



July 25. 1900. , about 20 m. Rocks and stones. 



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



July 30. The entrance to Stordalen, Havnefjord. 



July 31. Round Vestre Sund, Havnefjord. 20-60 m. 



Aug. 3. r Fosheim Peak and the valley on the west side of Havnefjord. 4 40m. 



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



Sept. 20. The head of the Gaasefjord, 640 m. Clay with small stones. 



June 28. 1901. The entrance to Hvalrosfjord. 



July 8. ,. Renbugten, about 20 m. 

 July 9. 



July 12. Bay near Landsend, about 35 m. 



Aug. 2. The head of the Gaasefjord, about 40 m. 

 Aug. 16. , about 14 m. 



