. 13 14 15 ~r 16 ~T —r- 17 ~r SEXUALLY LENGTH IMMATURE O— —1— IB IN T T —1— 20 T ~~r 21 ~r 19 METRE5 SEXUALLY MATURE —1— 22 —1— 23 E4 Fig. 3. Fin whales, females. South Georgia, 1929-30. Length frequency in half-metre length groups and number of age series of scars. it is difficult to tell where an older scar series left off and a newer one began. It is, in fact, possible to find a feasible explanation for a number less than the theoretically correct number of superimposed age series: it is more difficult to explain the capture of immature whales with a greater number of age series than their

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. 13 14 15 ~r 16 ~T —r- 17 ~r SEXUALLY LENGTH IMMATURE O— —1— IB IN T T —1— 20 T ~~r 21 ~r 19 METRE5 SEXUALLY MATURE —1— 22 —1— 23 E4 Fig. 3. Fin whales, females. South Georgia, 1929-30. Length frequency in half-metre length groups and number of age series of scars. it is difficult to tell where an older scar series left off and a newer one began. It is, in fact, possible to find a feasible explanation for a number less than the theoretically correct number of superimposed age series: it is more difficult to explain the capture of immature whales with a greater number of age series than their physiological con- dition warrants, unless they really are of greater age. While therefore the foregoing cannot be advanced as proof of the contention, it does suggest that the apparent disproportion between the catch of sexually mature and im-

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Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti