LAMELLIBRANCHIATA. 





and at East Iceland it occurs commonly together with the typical Montagui. At West Greenland the 

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

 Warhami is appearing; lastly, at Hast Greenland the variety Warkami is almost the only form. 

 Accompanying the elongation of the torm we also find an increase in the maximum length, namely 

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



Distribution. . Istarte Montagui is circumpolar in arctic seas. Towards the south i: reaches 

 to the Aleutians and Vancouver Island in the Pacific, and in the Atlantic to Massachusetts and the 

 Channel. 



Astarte sulcata da Costa. 

 PI. IV, figs. 3 a- a 

 Pectunculus sulcatus da Costa, Brit Conchol., 177S, p. 192. — Astarte sulcata Forbes and Hanlev, 

 Hist. Brit. MoH, I, 1853, p. 452, PI. 30, figs. 5- 6 1 ) & PI. 133, fig. 4; G. O. Sars, Moll. Reg. 

 Arct. Norv., 1S7S, 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 fin. 



- 16. W. of Iceland ... 250 - 



... 138 



(Brede Bugt) 76 



no 



- - 3'0 



■ - " 2 95 



S. W. of Iceland 136 ■ 



4.1 C. i spec. 



6.1 - 1 valve. 



<^xf - 2 spec, and several hundred 



separate valves, mostly of 

 very small specimens. 



1 large valve and many quite 

 small. 



ca. 20 valves. 



1 spec, ec 1 valve. 



4 spec, ec ca. 2" valves. 



10 separated valves of young 

 specimens. 



ca. 20 spec, ec mam' valves. 



i valve. 



6 ancient valves. 



1 valve. 



Some fragments of largei val- 

 ves and a number of valves. 

 separate 01 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 tin- figures under the Plate, fig <-> is given under tin- synonym A. Dan l>y a 



type-error as A. triangularis. 



98. 



86. 



8? 

 89 



9 

 8. 



85 

 S 4 



81 



73 

 6. 



S. E. of Iceland 



The tngolf-Expedition. II. 



14 



