44 0. NORDGAARD. [2nd ARC. EXP. fram 



Canu^ gives 3 species of Cellaria from Patagonia; and from the Belgian 

 antarctic expedition, Waters mentions 4 species, one of which, C. lata, 

 is described as new. Even in this there is an indication that Cancj's 

 general remark on the relation between the Bryozoan fauna in the nor- 

 thern and in the southern hemispheres, may probably have a special 

 application to the character of the arctic and antarctic fauna. The simi- 

 larity in the hydrographic conditions of the arctic and antarctic waters 

 in the present day, is not reflected at all in the Bryozoan fauna, as there 

 are few species in common^. And whatever the reasen may be, this 

 dissimilarity is connected with the fact that the age of the species seem 

 throughout to be less in the arctic than in the antarctic Bryozoan world, 

 which on the whole bears the impress of age. 



1 



Les Bryozoaires du Patagonien. 



See Waters, Bryozoa, Expedition Antaretique Beige; Calvet, Bryozoen, Ham- 

 burger Magalhaensische Sammelreise. 



