12 M The Canadian A rctic Expedition, 1918-18. 



Quinqueloculina seminulum Linne*. 



Two specimens, each partially broken, are referred to this common elongate 

 species, which seems to be very widely distributed. They are from station 290 . 



Quinqueloculina subrotunda Montagu. 



Two specimens, apparently of this common and widely distributed species, 

 were obtained from station 23. 



Specimens were also found attached to the shell of Buccinum cyaneum 

 from station 22. Awerinzew records this species of Quinqueloculina from the 

 Siberian Arctic. 



EXPLANATION OF PLATE. 



Fig. 1. Hyperammina subnodosa, with attached specimens of Tholosina bulla. This is apparently 

 a megalospheric specimen, the proloculum being greater in diameter than the tubular 

 chamber, and the entire length less than the full grown microspheric form, fig. 2. x 10. 

 From station 43a. 



Fig. 2. Hyperammina subnodosa, with attached specimens of Tholosina bulla. A microspheric 

 specimen of H. subnodosa with the diameter of the proloculum "ess than that of the 

 tubular chamber and the whole test large, x 10. From Station 43a. 



'* 



Fig. 3. Ammobaculites cassis, side view of very broad form, found in the Canadian Arctic Expe- 

 dition material. This is much broader than the usual specimens from other regions, 

 x 20. From Station 20 b-c. 



Fig. 4. Trochammina nana, ventral view, the last formed chamber very light in colour compared 

 to the earlier ones, x 125. From Station 290. 



Fig. 5. Verneuilina polystropha (?), side view of a verv slender form found in the Arctic material, 

 x 125. From Station 20 b-c. 



