340 ORNITHOLOGICAL EXPLORATIONS. 



curriDg in Kamtschatka the species of water birds are more numerous 

 than those of the other divisions together : 



Table IX. 



70 swimmers, or 40. percent. 



29 waders, or about 16.6 percent. 



3 game birds, or about 1.7 per cent. 



15 birds of prey, or about 8.6 per cent. 



6 picarians, or about 3.4 per cent. 



52 percliers, or about 29.7 per cent. 



Recalling what we said above in regard to the peculiarity of birds 

 living at the sea characterizing the marine regions rather than the 

 terrestrial provinces of the earth, we at once direct our attention to the 

 70 species of Kamtschatkan " swimmers" or "nafatom" of some sys- 

 tem atists. 



The swimmers are divisible into two categories, marine and fluviatile 

 natatores, the former group being, of course, the one of interest in the 

 present connection. It embraces the following species: 

 Table X. — Kamtschatkan Marine Natatores. 



1. Uria lomvia arra. 18- cachinnans. 



2. troile califomica. 19. karatschatkensis. 



3. Ceppbus columba. 20. canus. 



4_ carbo. 21. Rissa tridactyla pollicaris. 



5. Brachyramphus marmoratus. 22. brevirostris. 



6. kittlitzii. 23. Gavia alba. 



7. Syntbliboramphus antiquus. 24. Stercorarius pomarinns. 



8. Simorhyncbus pygmsens. 25. Diomedea albatrus. 



9_ cristatellus. 26. Fulmarus glacialis glupischa. 



10. pusillus. 27. Puffinus teuuirostris. 



11. Cerorhinca monocerata. 28. Oceanodroma lencorhoa. 



12. Cyclorrhyncbuspsittaculus. 29. furcata. 



13. Lunda cirrbata. 30. Eniconetta stelleri. 



14. Fratercula corniculata. 31. Somateria v nigra. 



15. Larns glaucescens. 32. spectabilis. 



16. glaucus. 33. Phalacrocorax urile. 



17. Larus scbistisagus. 34. pelagicus. 



Of these thirty-four species there are only two, viz, Cepphus carbo and 

 Larus kamtschatlcensis, which have not been observed on both sides of 

 the Pacific Ocean. The peculiar character of these birds is furthermore 

 evident from the fact that most of them are exclusively Pacific in their 

 distribution, only seven species, viz, 



Larus glaucus, Oceanodroma leucorboa, 



canns Eniconetta stelleri, and 



Cavia alba. Somateria spectabilis, 

 Stercorarius pomarinns. 



being iuhabitauts of the Atlantic shores too. In other words, about 



