86 LAMELLIBRANCHIATA. 



Jan Mayen. 



The Norwegian Nortli-.Vtlantic Expedition of 1877 took numerous, small specimens at 10— 2ofm., 

 the Austrian Polar Exped. of 1883 17 specimens up to 62 "'"'. long at a depth of 10 fm. The Danish 

 Expedition of 1900 also took several specimens up to 62 "'"'. long, but all empt>', at depths of 55 and 

 50—60 fm. 



Iceland. 



The species is very common on the north-west, north and east coasts (down to Berufjordr); 

 on the south-west coast it lives at any rate in Hvalfjordr; it has not been found on the south coast. 

 It keeps to soft bottom and depths of ca. (41 6— 6ofm. The largest specimen is 92"'"'. long. 



The various localities are as follows. 



East Iceland: 



Hornafjordr, beach. i spec. 



Berufjordr 35 — 22 fm. i — 



Djupivogr 6 - , mud with black sand. 9 — 



— 10 - , stones. 2 — 



Breiddalsvik 14 - , sand. 2 spec. & 3 valves. 



Faskrudsfjordr 50—20 - , blue clay. i spec. 



Eskifjordr 20 - i — 



Vidfjordr 15- i — 



Seydisfjordr. 18 — 



— , between the bridges on north 



side of fjord. i — 



— , Brimnes 4- i — 



— , at Skulavik 6 - , black sand. i — 



— 31—15 - 4 — 



— 38—14 - , mud. I — 



— 20 — 50 - I — 



— , mouth ca. 40 - , stomach of haddock. i — 



Bank off Lodmundarfjordr 38 — 47 - t — 



Vopnafjordr 6- 2 — 



6—12 - I — 



Bakkafjordr 12-15 - , black sand. 7 — 



— • 32 — 25 - , clay mixed with sand. i valve. 



Finnafjordr 18 - 5 spec. 



The specimen from the southernmost locality, Hornafjordr, is empty and only 8.5""". long; but 

 from Berufjordr northwards the species becomes common and reaches a considerable size (maximum 

 length 92 """.). The specimen from the shallowest depth, 4 fm. namely, is young (only 15.5 """. long), but 

 already at a depth of 6 fm. the species reaches a length of 89""". 



