LAMELLIBRANCHIATA. 



Granland, 1857, p. 92; Vidensk. Medd. Naturh. Foren., 1868, p. 220; Arctic Manual, 1875, p. 132; 

 Rink's Dan. Greenland, 1S77, p.441; Posselt, Medd. 0111 Gronland, XIX, 1895, p. 70; ibid. 

 XXIII, [898, p. 57; Hagg, Ark. f. Zoologi, Bd. 2, 1904, No. 2, p. 51; Jensen, Medd. om Gron- 

 land, XXIX, 1909, p. 352. 



The l, Ingolf" has taken this species at: 

 .St. 1 13. Norwegian Sea 1309 fin. 1 valve, of a very small spec. 



. 104. - 957 - 1 small spec, dead but with 



connected valves. 



98. W. of Iceland 13S - 5.9 C. 1 spec, (young). 



West Greenland. 



Here the species is very common from the southernmost part of the coast at least up to 

 Upernivik; further north, it has been taken in Melville Bay ("Fox"), and on the American side it has 

 been found as far north as at Grinnell Land in Dobbin Bay (/9°4o' N.L). It occurs most frequently 

 on clay bottom and in moderate depths (10 — 80 fm.), but is also found both on hard and quite soft 

 bottom, as also in greater depths (100 — 280 fm.). The largest specimen is 65 mm . long. 



East Greenland. 



It has been taken here at 5 localities, from Angmagssalik to Mackenzie Bay (65°35' — ca. 73V2 N. L,.) 

 and in depths of ca. 10 — 40 fm. The largest specimen is 62 mm . long. 



Iceland. 



( >n the north coast Cardium ciliatum is very common, as also on the east coast (at least down 

 to Berufjordr 1 ) and on the north-west coast; on the south-west coast it lives in Hvalfjordr 2 ); on the 

 south coast it has not been found. It keeps especially to clay and sand mixed with clay, but is also 

 found where there is ooze. The depths vary from 6— 85 fm., but are most frequently 25— 50 fm., the 

 young however being comparatively frequent in more shallow water; on the other hand, the "Ingolf" 

 took a very young specimen (living) at 138 fm. (cf. above). The maximum length is 74"'"'. 



The various places where the species was found are as follows. 



East Iceland: 



Myre Bugt 58 fm., sand mixed with ooze. 1 spec. 



Lonsvik 40 - , ooze and clay. 4 — & 10 valves. 



Berufjordr 6 - , mud with black sand. 2 — 



mouth 54—41 - , ooze. 27 — 



Breiddalsvik M - * sand. 3 — 



Faskrudsfjordr 50—20 - , blue clay. 24 — 



On the boundary to the south coast it has heen taken in Lonsvik and Myre Bugt, but only as small and dead 

 specimens. 



. also been taken at various places out in Faxafjordr (cf. the following list), but only as dead specimens 



and \ 



