. Bergens Museums skrifter. 47 The greatest circumference is between the pectorals and the dorsal fin, and amounts to barely half the length of the bod}- (in the full-grown animal to more than half). The dorsal fin, which is shghtly convex in front and very concave at the back, is situated almost in the middle of the body, though reaching a little over on to its anterior half, as in the female figured by Liitken (K. Danske Yid. Selsk. Skr. 6 R. m. n. Afd. IV, 6, pi. I). The dorsal fin amounts to rather less than Via of the length of the trunk (in the young female '/12. in the older female '/sj
. Bergens Museums skrifter. 47 The greatest circumference is between the pectorals and the dorsal fin, and amounts to barely half the length of the bod}- (in the full-grown animal to more than half). The dorsal fin, which is shghtly convex in front and very concave at the back, is situated almost in the middle of the body, though reaching a little over on to its anterior half, as in the female figured by Liitken (K. Danske Yid. Selsk. Skr. 6 R. m. n. Afd. IV, 6, pi. I). The dorsal fin amounts to rather less than Via of the length of the trunk (in the young female '/12. in the older female '/sj in the older male from -/s to Vs)- The breadth of the tail fin is equal to V4V, of the length of the trunk (in the younger animals from Vj to 'A, and in the older ones from '/+ to '/â â !> according to Lilljeborg, 1. c.) These projjortions of the pectorals and other fins in relation to the length of the trunk confirm most fully the general rule that all limbs and fins (caudal and dorsal fins) become longer with age (cf. Liitken, 1. c). The distribution of colour in this young one, agrees in all points with that commonly known in older Fig. 4. Outline of the tailfin ot' the milhiu. long female fætiis of Orca gladiator, seen from ahove. The dark colour of the body is a deep blue-black, and the light colour beneath, cream-white (PI. V, fig. 2). There is no blue or violet patch beside the dorsal fin. Passing over a few details at the junction of the black and the cream-white colours between the pectorals and the angle of the mouth, it may be observed that the light colour is here found on the lower border of the upper jaw, a circumstance which Lilljeborg states to be a rule, but which does not appear in the female figured by Liitken. General remarks. The generic and specific characters are perhaps developed earlier in the Orca than in many other species of Odontoceti. It is remarkable that in a fætus that is hardly Vs of the length of the newly-born ani
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Keywords: ., bookauthorbergensm, bookcentury1800, bookdecade1890, bookyear1894
