319 



Franz Joseph-Fjord, outer part of Mysk-\ ..„ „ /Clay. A very great number 



oxe-Fjord / ' \ of specimens. 



Mackenzie-Bay, N. of Franz Joseph-Fjord 6V2-IO Mud. 3 specimens (one empty). 

 — - — — 6V2-I9 Mud. A very large number of 



specimens. 



All the speciniens of this expedition belong to the var. 

 portlandica Reeve and reach a length of 25 ram. (comp. 

 R. Hägg 1. с. p. 14-16). 



Thus we see that Yoldia arctica at the northern East-Green- 

 land belong to the most common molluscs as it has been found 

 at numerous localities from ca. 69V2— 73V2° N. And it thrives 

 on this coast at depths changing from ca. 3 — 118 fms. 



In a fossil state it has only been taken at one locality, 

 namely at the Gaasefjord in Scoresby-Sound. The further de- 

 tails have been described by N. Hartz in the following way: 

 «At the inner end of Gaasefjord large clay-deposits were found 

 along the glacier river, formed of very fine dusty clay.... In 

 the clay was found a fragment of Portlandia (Leda) arctica 

 and at the mouth of the river a whole valve of the same species 

 which appeared quite recently to have been washed out of the 

 clay» M- I have verified the correctness of the determination. 



Portlandia intermedia M. Sars. 



1900. N. of Stewart-Island ... 158 fms. Clay with stones 2 specim. (young). 

 1900. The mouth of Hurry-Inlet 50 — Clay with stones 9 — 



1900. Fleming-Inlet 118 — Red clay 7 — (one empty). 



1900. Forsblad-Fjord 90—50 - Clay with stones 



and gravel ca. 40 — 

 1900. SE. of Sabine-Island ..110 — Fine clay with stones 



and gravel 3 — and 7 valves. 



1891— 92. Off Sabine-Island.. 127 — 1 valve. 



The maximum length is 16 mm. 



The Kolthoff-Expedition of 1900 took a specimen in 

 the outer part of Myskoxe-Fjord, a side-fjord of Franz Joseph- 

 Fjord, where the depth was il6V2 fms. and the bottom con- 

 sisted of clay (Hägg. 1. с. p. 11). 



) Medd. om Grønland, XIX, 1896, p. 176. 



XXIX. 21 



