9 2 



I.AMELLIBRAXCHIATA. 



Astartidse. 



Astarte borealis Chemnitz. 

 PI. IV, figs, i a— f. 



Venus borealis Chemnitz (partim), Conch. Cab. VII, 1784, p. 26, PL 39, fig.412 (non figs. 413-414 >). - 

 Tridonta borealis Sars, Moll. Reg. Arct Norv., 1878, p. 50, PI. 5, fig. 8 2 ). 



Astarte arctica Mnller, Index Moll. Groenl., 1842, p. 19. -- Astarte semisulcata Morch, Rink's Gron- 

 land, 1857, p. 92; Vidensk. Medd. Natnrh. Foren., 1867, p. 95; ibid. 1868, p. 222; Arctic Manual, 

 1875, p. 132; Rink's Dan. Greenland, 1877, p. 441. — Astarte borealis Posselt, Medd. 0111 

 Gronland, XIX, 1895, p. 71, PL I, figs. 8— 12 (var. sericea Poss.); ibid. XXIII, 1898, p. 61; 

 Jensen, ibid. XXIX, 1909, p. 335. 



The "Ingolf" has taken this species at: 



St. 33. Davis Strait 35 fin. 1 living, 1 dead spec, and 1 valve. 



- 35. — — 362 - 1 valve of a young spec. 



- 86. W. of Iceland 76 - 8 valves of young spec. 



- 124. N. - — 495 - 1 valve. 



- 125. - - - 729 - 1 - 



- no. N. E. of — 781 - 4 valves (corresponding). 



-120. — - 885 - 4 — — 



- 116. S. of Jan Mayen 37 1 - 4 — 



- 117. - - - — 1003 - 1 valve. 



- "3- " " " J 3°9 - l — 



West Greenland. 



A. borealis is common along the Danish part of the coast; further north, it is found at Port 

 Foulke on .Smith Sound (Hayes), on the American side even at Dumbbell Harbour at 82°3o'N.L. 

 ("Alert & Discovery"); the bottom-soil is mud, sand and clay. The depths recorded lie between 

 5— 501m. 3). The maximum length is 44 m,n . 



East Greenland. 



Here the species has been taken by Danish, Swedish and German Expeditions at quite a dozen 

 places on the stretch from Angmagssalik to Shannon Island (ca. 65°3o' — 75°3o' N. E.), in depths of 

 3 — 40 fm. The maximum length is 44 mm . 



Fig. 413 obviously represents Astarte crenata Gray, fig. 414 A. sulcata d. C. 



) A fairly detailed synonymy-list for this species of many names is given by Kobelt: Prodr. Moll. Test- Mar. 

 Europ., [888, p. 394. 



I As will be seen, the species is certainly taken in the Davis Strait at the considerable depth of 362 fm., but as the 

 shell in question is of a young specimen, the occurrence cannot be considered as normal 



