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ZOOLOGY: G. H. PARKER 
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Graph 2 
Graph 3 
GRAPH 1. ALASKAN FUR SEAL PUPS BORN IN THE SEASONS 1912 TO 1917 INCLUSIVE 
The abscissas represent years and the ordinates numbers of pups in thousands (table 1). 
The actual numbers counted, except those for the year 1913, fall on a curve represented by 
the full line which has been extended one year by extrapolation. All counts on the curve 
are probably low, the dotted curve indicating the direction of their real values. 
GRAPH 2. NUMBERS OF HAREM BULLS (A) AND OF IDLE BULLS (B) IN THE ALASKAN FUR 
SEAL HERD OF THE SEASONS 1912 TO 1917 INCLUSIVE 
The abscissas represent years, the ordinates numbers of bulls in thousands (table 1). 
The curve for harem bulls (A) is extended one year by extrapolation. 
GRAPH 3. THE AVERAGE HAREM IN THE ALASKAN FUR SEAL HERD OF THE SEASONS 
1912 TO 1917 INCLUSIVE 
The abscissas represent years, the ordinates numbers of females in the average harem. 
The curve has been extended one year by extrapolation. 
