LAMEIXIBRANCHIATA. 



6 5 



West Iceland: 



Ritur Huk-Straumiues 30 fin., in haddock. 2 spe< 



Dyrafjordr, inside Thingnses 10— I2 l j 2 - , mud and small stones. 1 



Hvalfjordr 24 - 1 



Faxafjordr, off Kollafjordr 10 - 2 spec. & 2 valves. 



, - 8 — n'/a - , ooze ami stones. 1 — 



, ea. 2 miles N. K. of Keflavik 19' „• 20' . - , ooze. 3 



, 4.3 miles W. 3/ 4 S. of Hel- 



gasker Vager 25 - 1 valve. 



All these are quite small specimens; the largest (from the first locality) arc only 12 . long. 



South Iceland: 

 Medalland Bugt 47 — 37 fm. 5 spi 



These specimens reach a length of up to 33 mm . 



The Faeroes. 



From earlier years we have several specimens of Tip to 53.5 ram . long, but the locality is merel) 

 given as "the Faeroes". In recent years M. nigra has been taken at the following places: 



Bordovig 7 — 10 fm., black sand, small sti mes, La- 



minaria. c8 spec. 



— 10 - , sand with Laminaria. 5 



Kongshavu 50 - 9 



Vestmanhavn 3 1 .. — 5 - , fine black sand. 1 



— 5 — 6 - , fine black sand. 1 1 



Traugisvaagfjord, head of o— 1 - 1 fragment. 



9 miles E. S. E. of Bispen ca. 70 - 4 spec. 



Among the specimens from Kongshavn there arc 2 which measure 39.5 and 1.3.5""".; the re- 

 mainder are only small specimens. 



The distribution is undoubtedly circumpolar; Modiolaria nigra has been taken at arctic \\\v 

 (Northumberland Sound and Wellington Channel, Jones Sound and Rice Strait), West and East Gr< 

 land and Spitzbergeu, in the Kara Sea, Polar Sea of Siberia and Bering Sea: towards the south it 

 reaches to Cape Hatteras, Dogger Bank and western part of the Baltic, Sea of Okotsk and North-West 

 America. -- The vertical distribution extends from ca.3— 200 fm. 



Variation. Modiolaria nigra is subject to no small modification in regard to the form of the shell; 



as will be seen from the measurements below, the height of the shell in these 17 specimens alone varies 

 from 4S.3— 5S.1 ",, of the length of the shell and the breadth from 29.6 p.8 of the length of the shell. 



The Ingolf-Expedition. II , 



