355 



dance in the far north of the east-coast: «Dr. Pansch fand 

 in dem Magen eines Walrosses 500 Körper dieser iMuschel 

 und nur ein einziges Stücken einer Schale. Neben den Eis- 

 löchern, aus denen die Walrosse auftauchen, lagen Haufen 

 von Schalen.» 



The majority of the valves, I have at hand, belong to the 

 form which by Forbes was called var. uddevallensis: the shell 

 is short, its posterior end obliquely truncate, the hind margin 

 going forwards below. Among the shells from the most southern 

 locality, Tasiusak (Angmagsalik), several have, however, a more 

 elongated shape, and some specimens have even the posterior 

 end obliquely truncate, the hind margin going backwards below, 

 and they are so elongated that they most nearly must be ascribed 

 to forma typica. The maximum length of this latter form is 

 65 mm., of var. uddevallensis 53"5 mm. 



Fossil it has been found in the following localities by 

 the Danish expeditions : 



1891—92. Danmarks-Ö, uppermost in the shell-heap between the station 

 buildings, ca. 20 feet above the sea-level. Grey clay. Many 



fragments. 

 1891 — 92. Hekla-Havn, from a gravelly area across the isle. Some frag- 

 ments. 

 1891—92. Hekla-Havn, at a cove. 14 valves, partly of var. uddevallensis 



partly of a more elongated shape. 



1891—92. Morænepynt, Scoresb) -Sound, in clay in terraces on the rock, 



till 120 feet over the sea-level. Many fragments. 



1891 — 92. The Terrassepynt on the east-side of Rypefjord, inner Scoresby- 



Sound. 4 valves of var. ovata^). 

 1891 — 92. Jameson-Land, in clay-banks ca. 50 feet above the sea-level. 

 Many valves, of a more or less elongated shape, on the whole thick. 

 1891—92. Jameson-Land, between Gape Hooker and Gape Stewart, in sand- 

 banks. A few fragments. 

 1900. Hurry-Inlet, opposite the anchoring place. Numerous valves (most frag- 

 ments) of var. uddevallensis and of a little more elongated shape. 



^) Ad. S. Jensen: Studier over nordiske Mollusker, 1. Муа. Vidensk. 

 Medd. Naturhist. Foren. Kbhvn. 1900, p. 133. In Medd. om Grønland, 

 XIX, 1896, p. 173, it is mentioned as «Mya arenaria«. 



