LAMELUBRANCHIATA. 



105 



and at East Iceland it occurs conmionK tdj^'ether with tlie typical Montagui. At West Greenland the 

 variety striata is by far the most predominant, and at the same time the still more elongated variety 

 Warfiaiiii is appearing; lastly, at East Greenland the variety Warhnuii is almost the only form. 

 Accompanying the elongation of the form we also find an increase in the ma.xiniuni length, namely 

 from ca. 19 -20""". at the Fseroes and West Iceland to 23—26""". at East Iceland and Greenland. 



Distribution. Astarte Montagui is circnmpolar in arctic seas. Towards the sonth it reaches 

 to the Aleutians and \'anconver Island in the Pacific, and in the .Vtlautic to Massachusetts and the 

 Channel. 



Astarte sulcata da Costa. 

 PI. IV, figs. 3 a— c. 

 Pecfiiiicnliis snlcatus da Costa, Brit. Conchol., 1778, p. 192. — Astartr sulcata Forbes and Hanle\', 

 Hist. Brit. Moll., I, 1853, p. 452, PI. 30, figs. 5- 6') & PI. 133, fig. 4; G. O. Sars, Moll. Reg. 

 Arct. Norv., 1878, p. 52. 

 Astarte sulcata Posselt (partim), Medd. om Gronland, XIX, 1895, p. 72; ibid. XXIII, 1898, p. 65. 



The "Ingolf" has taken this species at: 



St. 94. Off South-East Greenland 204 fm. 



W. of Iceland 250 - 



- - - 138 - 



16. 

 98. 



86 



87 

 89 



9 



8. 



85 

 84, 



81 



73 

 6. 



- - — (Brede Bugt) 76 - 



— — — no - 



- - — 310 



- - — ■••■ 295 



vS. W. of Iceland 136 



4.1° C. I spec. 



6.1° - I valve. 



5.9° - 2 spec, and several hundred 



separate valves, mostly of 

 very small specimen.s. 



I large valve and man)- quite 

 small. 



ca. 20 valves. 



I spec. & I valve. 



4 spec. & ca. 20 valves. 



10 separated valves of young 

 specimens. 



ca. 20 spec. & many valves. 



I valve. 



6 ancient valves. 



I valve. 



Some fragments of larger val- 

 ves and a number of valves, 

 separate or connected, of 

 quite small specimens. 

 West Greenland. 



Posselt records A. sulcata from Igaliko Fjord, Sukkertoppen and the fjord off Upernivik; of 



these I have seen one specimen labelled as coming from the first-named locality, but in appearance 



it is so "European", that I think it not unlikely that some exchange of labels has taken place. 



') In the explanation of the figures under the Plate, fig. 6 is given under the synonym A. Danmoniensis, fig. 5 by a 

 type-error as A. triangularis. 



S. E. of Iceland 



The Ingolf-Expedition. II. 



14 



