LAMELLIBRANCHIATA. 55 



Elsewhere the following iiifoniiatiou may be given regardiiio; the distribution of the species. 



West Greenland. 



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

 taken at 7 localities from the southernmost (Julianehaab) to the northernmost part (72°4' N. L.) of 

 Danish West Greenland, on clay bottom and at depths of 48—250 fin. The size is up to 5 """. 



East Greenland. 



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

 Sabine Island, or from 6972°— 7472° N. L. and at depths of 10—127 fni. It reaches here a .size of 6"'™. 



Jan Mayen. 



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

 The Danish Exped. of 1892 took 8 specimens S. of the island (70°32' N. ly., 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 i valve at a depth of 50— 6ofm. 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 i.sland (St. 117) 

 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.vitrcum has also been taken at the following places: 



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



64°58' — ii°i2' — 300 - —0.38" C. I spec. 



The Faeroes. 



Besides at the "Ingolf station N. of the Faeroes (St. 138, depth 471 fm.; maximum size of the 



specimens 4""".) D.vitreiiin has been taken at the following places: 



63^14' N.L., 9^46' W.L 260 fm. 18 spec. 



63°03' — 9°28' — 275 - I valve. 



5 miles N. b)- E. of east point of M)-ggences 50 - 2 valves. 



6i°4o' N. L., 7°4o' W. L i35 - i ^'alve. 



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



6i°7' _ 9°3o' — 440 - I valve. 



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



13 — W. by S. of Munken - i55 ' 9 — 



From the deepest of these places (475 fm.i the specimens have a size of 3.5"""., from the other 

 places still smaller (1—3"™.). 



