LAMELLIBRANCHIATA. 55 



Elsewhere the following information may be given regarding the distribution of the species. 



West Greenland. 



In addition to the "Ingolf" stations in the Davis .Strait, 318 — 1199 fm., D.vitrenm has been 

 taken at 7 localities from the southernmost (Julianehaab) to the northernmost part 172 4' X. 1. 1 oi 

 Danish West Greenland, on clay bottom and at depths of 4S — 250 fm. The size is up to 5 mm . 



East Greenland. 



Here D. vitreum has been taken by Danish Expeditions at 9 localities from Cape Dalton to 

 Sabine Island, or from 69 1 /.. — 74V2 N.E. and at depths of 10 — 127 fm. It reaches here a size of 6 mm . 



Jan Mayen. 



The Norweg. North-Atlantic Exped. took D. vitreum at 2 stations, with depths of 70—95 tin. 

 The Danish Exped. of 1892 took 8 specimens S. of the island (7o°32'N. L., 8°io'W. L.), at a depth of 

 470 fm.; the Danish Exped. of 1900 took 4 specimens and 2 valves at a depth of 55 fm., as also 3 

 specimens and 1 valve at a depth of 50— 60 fm. Lastly, as shown above, the "Ingolf Exped. found it 

 at 2 stations at a depth of 86 and 371 fm., as also a specimen far to the south of the island (St. 1171 

 at a depth of 1003 fm., but it is only 2.5 """. long. 



Iceland. 



Apart from the stations of the "Ingolf north-east, north, west, south-west and east of the island, 

 D. vitreum has also been taken at the following places: 



66°32' N. L., I5°i5' W. L 75 fm. 1 valve. 



64°58' n°i2' — 300 - — o.3S°C. 1 spec. 



The Faeroes. 



Besides at the "Ingolf station N. of the Fasroes (St. 138, depth 471 I'm.; maximum size of the 

 specimens 4 mm .) D. vitreum has been taken at the following places: 

 63°i4' N. L-, 9°46' W. L 260 fm. 18 spec. 



6 3°°3' — 9° 28 ' - 2 75 " ' valve - 



5miles N.by E. of east point of Myggenses 50 - 2 valves. 



6i°4o' N.L., 7°4o' W. L 135 - 1 valve. 



6i°i5' — 9 U 35' — ca.475 - 2 spec and 9 valves. 



6i°7' — 9°3o' — ^40 - 1 valve. 



6 miles N. by W. of Kalso 60 2 valves. 



l 3 — W. by S. of Munken - 155 - ( ) 



From the deepest of these places (475 fm.) the specimens have a size of 3.5 ""»., from the othei 

 places still smaller (1—3 """.). 



