. -1 1 1 1 r 17 18 19 20 21 LENGTH OF WHALE IN METRES Fig. 50. Spacing of the baleen in Blue whales. The plotted points represent the spacing of the baleen in individual whales. (Black symbols represent South African whales, and circular ones South Georgia whales.) run back as far as the umbilicus. The rest become progressively shorter so that their posterior ends form a line which curves forwards to the axilla. Posteriorly the median grooves may end evenly behind the umbilicus, as in Plate XXX, fig. 3, but there is a certain amount of variation here, for some grooves may extend further back t
. -1 1 1 1 r 17 18 19 20 21 LENGTH OF WHALE IN METRES Fig. 50. Spacing of the baleen in Blue whales. The plotted points represent the spacing of the baleen in individual whales. (Black symbols represent South African whales, and circular ones South Georgia whales.) run back as far as the umbilicus. The rest become progressively shorter so that their posterior ends form a line which curves forwards to the axilla. Posteriorly the median grooves may end evenly behind the umbilicus, as in Plate XXX, fig. 3, but there is a certain amount of variation here, for some grooves may extend further back than others, or the posterior ends may be broken up and very indefinite, and sometimes in males there is a median groove continuous with the umbilicus and genital aperture (see Plate XXIX, fig. 3, Plate XXX, figs, i and 2, and Plate XXXI, fig. 4). On each side of the genital aperture in females there is often, in addition to the mammary grooves, a varying number of small grooves not more than a foot or two long
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectocean, booksubjectsci
