LAMELLIBRANCHIATA. 85 



Christiaiisund in western Norway, by W. C. Brogger at Cliristiaiiia (in tlic "yonn<;cr Area-clay") and 

 by Knipowitsch at Dwiiia. 



Remarks. Measurements of some specimens show, tliat tlie sliape is more or less variable : 



LeiifTth of shell Height of shell lireailth of shell 

 12.5 """. 11-25 """• ^ " "'• 



12.5 - 10 - 8 - 



12 - 11.5 - 9.5- 



12 - 9.5 - 7-5- 



ICardium norvegicum Spengler.] 

 Worch has shown already (Vidensk. Meddel. Naturh. P'oren. Kbhvn. 1867, p. 94), that Jeffreys' 

 reference to this species as Fceroese (Brit. Conchol. II, 1863, p. 296) is due to a misunderstanding. 



Cardium (Serripes) groenlandicum Chemnitz. 

 PI. Ill, figs. 12a— b (young). 



Cardiiiin groenlandicum Chemnitz, Conch. Cab. VI, 1782, 1x202, PI. 19, fig. 198. — Cardiuiii horeale 

 Reeve, Conch. Icon. II, 1844—45, Sp. 131, PI. 22, fig. 131. — Cardmiii fabricii Deshayes, 

 Proc. Zool. vSoc, 1854, p. 333. — Aphrodite groenlandica Gould & Binney, Rep. Invert. 

 Mass., 1870, p. 144, fig. 454; Sars, Moll. Reg. Arct. Norv., 1878, p. 49, PL 5, fig. 3. 



Vcnits islaudica Fabricius (non Linne), Fauna groenl., 1780, p. 411. — Cardium groenlandicum 

 :\Ioller, Index Moll. Groenl., 1842, p. 20; Beck, in Gaimard, Voyage de la Recherche, PI. 15, 

 fig. I— 15; Morch, Rink's Gronland, 1857, p. 92; Vidensk. Medd. Naturh. Foren., 1868, p. 221 

 {\2.x. solida) ; Arctic Manual, 1875, p. 132; Rink's Dan. Greenland, 1877, p. 441 ; Friele, Nyt 

 Mag. f. Naturvidensk., 24 Bd., 1879, p. 222; Becher, Osterr. Polarst. Jan Mayen, 1886, III, 

 p. 70; Posselt, Medd. om Gronland, XIX, 1895, p. 70; ibid. XXIII, 1898, p. 55; Jensen, 

 ibid. XXIX, 1909, p. 353; Hagg, Ark. f. ZooL, Bd. 2, 1904, No. 2, p. 50. 



The "Ingolf has taken this species at: 



vSt. 113. Norwegian Sea 1309 fm. A fragment of a left valve. 



. iig. - loio - A fragment of a right valve. 



West Greenland. 



The species is one of the commonest Molluscs here, from the southernmost part of the coast 

 at least up to Upernivik ; further north it has been taken by the "Fo.\" in Melville Bay and by the 

 "Fram" on the American side in Rice Strait (78°45' N. L.). It keeps mainly to soft (clay) bottom and 

 to depths of 10— 5ofm. It may attain a length of no""". 



East Greenland. 



It has been taken here at 9 localities, distributed from Angmagssalik to Sabine Island, with 

 depths of ca. 7— 25 (40) fm. The largest specimen was 70'""'. long. 



