List of land and freshwater animal species 39 



? COTTUS GOBIO L.^ 



(Bullhead) 



/. typ. sbsp. sibiricus sbsp. cognatus Rich. sbsp. ricei Nels. 



Kessl. 

 Eur., E to Petchora. Sib.: Ob-Lena. Alas.-Marit. Prov. SE Alas.-Ontario. 



of Canada. 



Esox LUCIUS L. (estor LeS.) 

 (Pike) 



Irel. & Scand.-Anadyr (extreme NE Alas.-Labr., S to Ohio & New York. 



Sib.), S to Italy, Asia Minor, W Tur- 



cestan. 



LOTA LOTA L. 



(Burbot) 



/. typ. sbsp. leptura Hbs. & sbsp. maculosa LeS. 



Schtz. 



Palaearct., E to Lena R. NE Sib. (Kolyma & Ana- Rest of N. Amer. 



dyr); NW N. Amer. (Alas. 

 & Mackenzie R.). 



Insecta — Insects 



The insect fauna, when properly worked out in a remote future, will no doubt 

 provide the best foundation for a comparative analysis of the Europe — North- 

 America relations. At the present time only a small fraction of this, the largest class 

 in the animal kingdom, has been the subject of modern revisions and is thus suit- 

 able for our purpose. It was difficult to find, among other things, reliable data on 

 the distribution of most species in northern Asia, a matter of great significance for 

 classifying the geographical type and the history of the species. 



The list of insects here given could possibly have been extended to include other 

 groups but the selection has been made in such a way that the main biological 

 types, above all the types of dispersal, should be represented, which was considered 

 more important than taxonomic completeness. 



^ Berg (1933, p. 169; 1949, p. 1 148) regards sibiricus as distinct from gobio. Wynne- 

 Edwards (1952, p. 22) says that cognatus is "scarcely distinguishable from C. gobio" but regards 

 ricei as the North American representative of sibiricus. The taxonomic difficulties in this 

 group are also pointed out by Jordan, Evermann & Clark (1930). 



