LamellibranchiaTa. 41 



Seas tinder this name [T.. cUipticaJ. ITiifortnnately the name had been used in Augnst 1861, by 

 Whiteaves (Ann. Nat. Hist. ser. 3, vol. \'III, p. 146) for a fcssil from the "CoralHan OoHthes of Ox- 

 ford". Under these circumstances, as I am unable to trace any other name appHcable to the recent 

 shell, I propose to name it Lima givym\ nom. nov." 



Lima hyperborea Jensen. 

 PL II, figs. 5 a — e. 

 Lima f 1(1(1 liyperborca Jensen, Medd. om Gronland, XXIX, 1909, p. 329, figs. la-d. 



The shell oval or elliptical, extremely tumid, white or yellowish white with a faint lustre. 

 The valve is thin, slightly oblique, with the anterior margin forming a slight, regular curve, the 

 posterior margin somewhat more strongly curved outwards above, with ca. 24 — 36 fine, btit distinctly 

 elevated, sharp radiating ribs, disappearing outwards towards the sides, two of the central ones as a 

 rule stronger and with larger interspace than the others, thus producing a fairly well-marked furrow, 

 lying almost medially or a little to the anterior side of a line through the middle of the valve 

 (sometimes however only one prominent median rib); the concentric striation extremely fine; the 

 beaks prominent; the hinge-margin relatively long, almost straight, passing into the lateral margins 

 at an obtuse angle; the cartilage-pit triangular; the inner side glistening silvery white or of a pearly 

 lustre. Height 15 "'"'., length 9.5"""., breadth 9 "'"\ 



The "Ingolf" has taken this species at: 



St. 116. S. of Jan Mayen 371 fm. — 0.4° C. i spec, and fragments 



of 2 valves. 



- 139. N. of the Fseroes 702 - — 0.6° - 2 spec. 



Whilst the specimen from St. 116 is 20"'"'. high, the largest from St. 139 is only 4.5""^. 



Lima kyferborca was originally described by me from East Greenland, where it was taken 

 by the Danish Exped. of 1900 at the following places: 



Fleming Inlet 118 fm. clay. i spec. 



Forsblads Fjord ca. 50 - clay with stones. i — 



Forsblads Fjord 90 — 50 - clay with stones. 12 spec, and 14 valves. 



The largest of these specimens measures: height 16.5 "'"'., length 10™"'. 



Distribution. In addition to at E. Greenland Lima liypcrbnrca lives at Jan Ma^en and in the 

 "cold area" N. of the Fseroes, at Spitzbergen and in the Kara Sea (40— 70 fm.)'), from which I haye 

 seen specimens preserved in the Stockholm State-Museum. It also lives presumably in the Barents 

 Sea and in the cold Norwegian Sea, where "L.snbovata Jeffr." is said to have been taken at several 

 places, according to Friele and Grieg^), as confusion with the present species has probably occurred. 

 The same also holds good probably with regard to the •'Lima clliptica Jeffr." taken by the Dutch 



>) The specimens from the Kara Sea were referred by W.Leche to Lima sulcuhis (Leach) Loven; Kongl. Sv. Vet. 

 Akadeniiens Handl. Bd. i6, No. 2, 1878, p. 34. 



2) Norw. North- Atlantic Rxped. Zool., MoUusca III, 1901, p. 7. 



The Ingolf-Expedition. II. 5. ° 



