LAMELLIBRANCHIATA. 



■7 



It is naturally due to chance that all the shells brought home are small in size, none over 

 6o mm ; in reality very large specimens occur at North Iceland and in extremely large quantities at places. 



West Iceland: 



Hesteyrarfjordr 15 — 17 1 /, fm. 



Dvrafjordr, inside Thing-uses 10 — I2 1 /; - . mud and small stones. 



— 18 - 



20 - 



Bildudalr 5 — 7 - 



Fossfjordr 44 - 



Talknafjordr 14 - 



ca. 24 - 



N.W. of Talkni 



Patreksfjordr drag-net on beach 



65°i7.5'N.L., 23°24'W.L 28 fm. 



Hvalfjordr 24 - 



Faxafjordr, Keflavik 15 — 16 - , fine, black sand. 



, ca. 2 miles N.E. of Kefla- 

 vik I 9 I /i — -° l U ' - ooze. 



, ca. 3 miles N. 59 W. of 

 Grotta Light 25 - 



Reykjavik Roads 



— near Engey 



, Engey 7 — 872 - , ooze. 



Hafnarfjordr 4 — 7 - 



1 valve. 

 1 spec. 



1 — 

 8 - 

 1 — 



, 1 mile E.N.E. of Helga- 

 sker Vager n", - , bottom-temp. 9-3°C. (August). 6 — 



, 1 mile W-V 4 N. of Helga- 

 sker Vager i4'/ 2 - 4 — 



Even at the southern boundary of its occurrence at Iceland the species attains a considerable 

 size; the specimens from Hvalfjordr reach a size of up to 8o" im , from Reykjavik up to 115 and from 

 Hafnarfjordr up to 78 n,m . Outside the fjords however, it has not been taken further south than in 

 Brede Bugt, and the living specimens from there are only 20 — 25 """. 



[The Faeroes.] 



In recent years a number of shells of P. islandicus, all large (72 — 90 """) and with a "fossilized" appear- 

 ance, have been taken with the dredge at various places out to sea round about the islands, namely: 



S. of Myggemes from the line-fishing 1 valve 



Akralejte in N.57W. 12 miles 1501111. 3 , fragments. 



6i°io'N.L.., 5 46'W.k 150 — 160 - 1 



61 2i'N.L., 5 12'W.L 210 - 1 



The [ngolf-Expcdition. II. 5. 



