14 JAMES A. GRIEG. [SEC. ARCT. EXP. FRAM 



The largest specimens found by the Fram Expedition are up to 

 41 mm. long. By way of comparison it may be stated that on the west 

 coast of Greenland this species attains a size of 36 mm. (POSSELT), on 

 the east coast it can be 36.25 mm. (JENSEN) at Spitzbergen 45.5 mm. 

 (KNIPOWITSCH) and in the Bering Sea 51 mm. (KRAUSE). Some of the 

 largest specimens measure: 



Grass. 14.5 mm. 

 12.5 

 13 

 13 

 10.5 

 10.5 

 11.5 

 11.2 



Some of the specimens are characterised by their narrow and elon- 

 gated form. The posterior end of the shell tapers comparatively sharply. 

 This form is most frequently met with in specimens from the head of 

 the Gaasefjord. On the other hand there are several specimens which 

 have a remarkably high shell. The most characteristic feature in their 

 case, however, is that the posterior end of the shell is more obtusely 

 rounded, so that the shell's form reminds one of tellina torelli. In the 

 illustrations I have shown the two most pronounced instances of these 

 forms; the 41 mm. specimen from the head of the Gaasefjord (Fig. 2), 

 and the 37.5 mm. specimen from Forvisningsdalen (Fig. 3). Between 

 these extreme forms there are scarcely distinguishable intermediate forms. 



Tellina, macoma, torelli, IAP. STEENSTRUP. 



Locality: 



Sept. 22. 1899. The winter harbour, Havnefjord, 16 m. 



March 7. 1900. Bay south of Sjopolse Ness, Havnefjord, 30-40 m. Small stones 

 slightly overgrown with laminaria. 



The two largest specimens measure: 



Long. 14 mm. Lat. 10.5 mm. Crass. 5.7 mm. 



13.7 10.5 5.5 



These specimens are thus slightly larger than the biggest living 

 specimens which JENSEN has investigated (13.5 mm.). Their form is 

 almost exactly similar to the fossil shells from Vendsyssel which he 

 has depicted (tab. 1, fig. 3 f i). 



