340 



1901. Tiningnekelak 5 — 10 fms. 3 specimens. 



1900. Cape Dalton 9 — 11 — Clay ca. 30 — 



1891—92. Hekla-Havn 3—6 — Mud ca. 20 — 



1900. Hurry-Inlet, the mouth 10 — Clay 2 — 



1900. Forsblad-Fjord, the mouth . . . 14—3 — 3 — (1 empty). 



The species was previously taken by the Swedish Expedition 

 of 1883 «off the southeast-coast, 25 — 40 fms.» and by the 

 Germania-Expedition at the northern East-Greenland (Möbius 

 1. с. p. 251, s. п. и A. sulcata»). 



The specimens which I have at hand from East-Greenland 

 are on the whole rather lengthened, as will be seen from the 

 following measurements : 



Length. 

 Cape Dalton 29"5 mm. 



— — 29-5 — 



Hurry-Inlet 27 — 



Hekla-Havn 23-5 — 



— — 22-6 — 



The folds are stretching most frequently down to the ventral 



edge, it is however not seldom that they stop about the middle 

 of the shell. 



Posselt has set up the variety depressa^) for the most 

 lengthened specimens (those from Hekla-Havn). 



In a fossil state it has been taken in the following lo- 

 calities by the Danish East-Greenland-Expedition of 1900: 



Hurry-Inlet, opposite the anchoring place 2 valves. 



Hurry-Inlet, Northern part, Liverpool-Coast 7 — 



Hurry-Inlet, Northern part, from different banks, Ryders-EIv at 



the main river 3 — 



Hurry-Inlet, Northern part, quite down at the tributary river, 20 — 



30 feet above the sea-level ca. 25 — 



The maximum length is 34 mm. The specimens are charac- 

 terized — just as the specimens living at present at East-Green- 

 land's coast — by the lengthened shape. As examples 1 shall 

 state the measurements of some valves: 



Height. 



Breadth. 



21-5 mm. 



12-5 mm. 



21-5 — 



11-5 — 



20 - 



9-5 — 



16 — 



8 — 



16-5 — 



7-75 — 



^) H. J. Posselt: Østgrønlandske Mollusker. Medd. ош Grønland, XIX, 

 1895, p. 72, Tab. I, Fig. 5-7. 



