5° 



LAMEIXIBRANCHIATA. 



Faxafjordr 25 fm. Many valves. 



1472 - ! spec. 



Keflavik 15 — 16 - , fine black sand. 3 fragments. 



Reykjavik beach, on Laminaria rhizoids 11 spec. 



Vj 2 fm., stony bottom. 2 spec. 



8 - 4 - 



Hafnarfjordr beach 3 — 



4 - r - 



25 - , fine black sand and ooze. 1 valve. 



1 mile E. N. R. of Helgasker 



Vager n 1 /, - 2 valves. 



It has thus been taken living even at a depth of 30 fm.; the specimen from the "Ingolf" St. 87, 

 which also lies on the west coast of Iceland at a depth of iiofm., was on the other hand empty and 

 may possibly have been carried out with L,aminaria, to the rhizoids of which M. modiolus is accustomed 

 to attach itself by means of its byssus. The largest specimen is 146 mm . long. 



South Iceland: 



63°3o' N. L,., 20 14' W L 42 fm. 3 valves. 



Heymaey, Yestmannaeyjar beach. 4 spec. & many valves. 



Vestmannaeyjar 30 fm., shell-gravel. 3 valves. 



49 - , clay with a little mud. Fragments of 3 valves. 



The specimens washed up on the beach at Heymaey are up to 95 mm . long. 



The Faeroes. 



According to earlier authors (Svabo, Landt) M. modiolus occurs at many places at the 

 Faroes; after a heavy sea it is often found washed into the bays, not rarely hanging to large tufts 

 of seaweed under whose rhizoids it likes to live. 



The largest specimens I have seen are 155""". long; large specimens are taken at a depth of 

 even ca. 100 fm. 



In recent years it has been taken at the following places at the Frcroes: 



Klaksvig n fm., on Laminaria rhizoids. 5 spec. 



Fundings Fjord 12 — ca. 20 - , coarse sand and clay. 1 — and 16 valves. 



Andefjord 16 — 23 - 1 — 



Kongshavn 12 — 16 - 2 — 



Vestmanhavn 3V2— 5 - , fine black sand. 1 — 



4 - , sand. 1 — 



4-5 " 1 - 



ca. 10 - 2 — 



10 — 30 - 10 — 



