102 



SEAL LIFE ON THE PRIBILOF ISLANDS. 



The area of the several rookeries ou St. Paul iu July of the present 

 year, as indicated ou the maps made by Mr. G. H. Towuiseud, is shown 

 below. I have divided the total area iu the case of each rookery into 

 two parts, on one of which the seals are distributed about as on the 

 parts counted as regards density, and ou the other are massed together. 

 The areas are as follows: 



Not massed. 



Massed. 



Upper Zapadnie 



Lower Zapadnio 



Tolstoi 



Lagoon 



Reef 



Ketavie and Lukainion 



Little Polaviua 



Big Polavina 



Nortlieast Poiii t 



Square feet. 



168, 734 



131,725 



160, 580 



82, 241 



330, 523 



22(5, 303 



29, 969 



64, 748 



378, 240 



Square feet. 



51, 854 



4,600 



80, 220 



115, 138 



10, 239 

 361, 443 



Employing again INIr. Townsend's maps, I find that the 1,204 cows 

 counted ou the Lagoon rookery covered an area of 82,241 square feet, 

 making the average occupied by each cow 05 square feet. The 4,110 

 cows counted on Ketavie and Lukaunon rookeries covered 180,71 2 square 

 feet, or 40 square feet for each cow. 



On Tolstoi 1,520 cows occupied 44,090 square feet, or 20 square feet 

 for each. 



The average is as follows: 



Sqnaro feet. 



Lagoon rookery 65 



Ketavie and Lukannon rookeries 46 



Tolstoi 29 



Average 46 



If we divide the number representing the total area of the rookeries 

 on St. Paul by 40 we should find thereby the number of cows. It 

 happens, however, as already stated, that on certain i)ortions of the 

 rookeries the seals are massed together, and for tliese areas it has been 

 decided to consider tlie average density as double that of tlie remaining 

 parts, which Avould give us 23 square feet as the average area occupied 

 by each cow. 



The cows on the whole area of the Lagoon rookery having been 

 counted, the number obtained by this enumeration will be included 

 instead of an estimate, and the same course will be taken with Lukan- 

 non and Ketavie rookeries. 



The result is as follows: 



Cows. 



Lagoon rookery 1, 264 



Ketavit^ and Lukaiuion rookeries 5, 312 



Tolstoi, Keef, Little Polavina, IMg Polavina, Northeast Point, Upper Zapadnie, 



and Lower Zapadnie rookeries 54, 860 



Total 61, 436 



