308 



Toreil, Crenella decussata Mont., Limatula hyperborea n. sp., 

 Teilina Torelli lap. Steenstr., Tellina Loveni lap. Steenstr., Car- 

 dium elegantulum Moll., Cyrtodaria Kurriana Dunker, Lyonsiella 

 abyssicola M. Sars, Thracia truncata Tur t., Thracia septen- 

 trionalis Jeffr. and Pandora glacialis Leach. 



The greater part of this new material has been collected 

 by the late zoologist Sören Jensen who took part in the 

 Amdrup-Hartz expedition in 1900. Quantitatively seen this 

 material is far superior to that collected by the earlier expedi- 

 tions and adds a most important contribution to the information 

 of the horizontal and vertical distribution of the various species 

 along the East-Greenland coast. A rather considerable material 

 was moreover collected by the botanist Chr. Kruuse, who 

 stayed in Angmagsalik in 1901 — 02 and who on my request 

 availed himself of the opportunity of making zoological collec- 

 tions. Finally, a good deal of molluscs were collected at Ang- 

 magsalik and in some more nortliern localities by Chr. Kruuse 

 and the physician K. Poulsen (who took part in Amdrup' s 

 expedition in 1898 — 99), although they met with great obstacles 

 caused by the ice. 



The 41 species of Lamellibranchiata which at present are 

 known from East-Greenland are as follows (they will be more 

 closely mentioned in the subjoined pages): 



1. Nucula tenuis Mont. var. expansa Reeve, p. 315. 



2. Leda pernula Müll. var. costigera Beck, p. 316. 



3. — minuta Müll., p. 317. 



4. Yoldia (Portlandia) arctica Gray var. portlandica Reeve, 



p. 317. 

 — — — var. nux Brøgger. 



5. Portlandia intermedia M. Sars, p. 319. 



6. — lenticula Moll., p. 320. 



7. — frigida Torell , p. 320. 



— — — var. nana M. Sars. 



8. Area glacialis Gray, p. 321. 



