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LAMELLIBRANCHIATA. 



The "Ingolf" has taken this species at: 

 St 86. West Iceland (Brede Bugt) 76 fm. 



- 6. S. E. of Iceland 90 - 



A spec. 13 mm . long and 3 valves of small 

 specimens and fragments of a larger 

 specimen. 



A fragment (with sharp edges) of a large 

 specimen. 



I West Greenland |. 

 The Copenhagen Zoological Museum contains: 



a. 2 corresponding valves, 43 mm . in length, taken according to the label at Jakobshavn by 

 Dr. Rudolph; on this basis C.islandica was for the first time recorded as belonging to Greenland in 

 Morch's list of 1857. The periostracum is preserved; there is no trace of soft parts and the valves 

 bear distinct marks of having lain in a mass of sand mixed with clay. 



b. 1 right valve 1 ), 37 mm . long 2 ), taken according to the label by the malacologist H. P. C. Moller 

 (thus about the middle of last century) in "Davis Strait, 7— 8 miles from land". 



Thus, living specimens are not known from Greenland, and it seems to me inconceivable, that 

 a Bivalve such as C. islandica could possibly have escaped attention, if it now lives anywhere at 

 Greenland In the first place, its size is considerable, so that it is not likely to have been overlooked, 

 as the Danish part of the West Greenland may be said to have been well-investigated, so far as the 

 coastal belt is concerned. Further, we must remember, that C. islandica is frequently washed up on 

 the beach, near which it lives; but C.islandica is not found either among the large number of 

 washed-up shells, which have been brought home from Greenland. 



These facts seem to me to indicate quite definitely, that C. islandica does not now live at 

 Greenland; the "dead" shells mentioned above may be taken to have been "subfossil", unless some 

 change of label has taken place in the course of time. 



In any case Cyprina islandica shoitld be omitted from the Greenland fauna. 



Iceland. 



The species is to hand in large numbers from the east, north, west and south coasts, so that it 

 is probably common all round the island?). Adult specimens have been taken at depths of 4— 30 fm. 4), 

 the young clown to 76 fm. It lives chiefly on sandy bottom or sand mixed with clay, but may also 

 be met with on clay bottom. The maximum length is 105 mm . 



Faeroes. 



Ik-re the species is quite common, on sandy bottom or sand mixed with clay, and reaches a 

 length of no mm . Adult specimens have been taken at depths of 5— 50 fm., the young down to 70 fm. 



') This single valve is erroneously given in Posselt as "2 spec". 



2 ) It is consequently misleading, when the length is given as 120 mm. in Consp. Faunae groeulandicse. 



)) I omit stating the various places where it has been found, as the material at hand consists for the most part of 

 young and small specimens, whilst adults are rarely brought home, owing to the large space they take up. 



1 On the south and south-east coasts, however, large empty shells have been taken at several places at greater 

 depths, down to go fm. 



