r.AMRLURRANCHIATA. 



"3 



Figs. 4 c and d represent a vcr\- elongated form (var. drprrssa Posse! ti, IVoni Hast (Treenland. 

 Figs. 4e and f show a very high (and ventricose) form (var. crassa lycche), from West Greenland. 

 ^i§'- 4& shows a specimen in which tlu- folds disappear almost about the middle of the shell. 

 From West Greenland. 



Distribution. Astarte clliptica is an arctic-boreal sjjecies, known from the east coast of North 

 America down to New England, from Greenland, Iceland, the Fseroes, British Isles, Danish waters 

 down to Bornholm, Norway, north coast of Russia, Kara Sea and Spitsbergen. The batluinetric 

 distribution is 3 — 235 fm. 



Astarte crenata Gray. 

 PI. IV, fig.s. 5 a — m. 

 Nicania crenata Gray, Parry's first voyage, Suppl. to Append., 1824, p. 242. 



Astarte crebricostata Morch, Rink's Gronland, 1857, p. 91; Vidensk. Medd. Naturh. Foren. 1S68, p. 222; 

 Arctic Manual, 1875, p. 131; Rink's Dan. Greenland, 1877, p.441. — Asfartr crenata Posselt, 

 Medd. om Gronland, XIX, 1895, p. 71 ; ibid., XXIII, 1898, p. 64; Jens|en, ibid., XXIX, 1909, p. 337. 



The "Ingolf has taken this species at various stations and in three varieties, namely: 



forma typica 

 St. 29. Davis Strait. 



68 fm. 



0.2° C. 



I spec. 



St. 32 



- 31 



- 35 



- 28. 



- 27, 



- I IS 



var. subcequilatcra Sowb. 



Davis Strait 318 fm. 



— — 88 - 



— — 362 - 



— — 420 - 



— — 393 - 



Jan Mayen 86 - 



3-9° C. 

 1.6° - 



3-6°- 

 3-5°- 

 3-8°- 

 0.1° - 



Numerous spec. 

 3 spec. 

 Numerous spec. 



6 spec, and a number of con- 

 nected or separated valves. 



var. acuticostata Jeffr. 



St. 116. S. of Jan Mayen 37i fm. 



15. N.W. of Iceland 330 - 



- 124. N. of Iceland 495 - 



- 126. - - — 293 - 



- 128. - - — 194 - 



- 106. E. of Iceland 447 - 



3. Between Faeroes and Iceland. . . 272 - 

 and also at the following station, where the variety cannot be determined: 



St 127. N. of Iceland 44 fm. 5.6° C. i spec. S: i valve (both .small). 



The Ingolf-Expedilion. II. S- 



15 



