. Bergens Museums skrifter. 22 The body has the elegant spindle shape characteristic of tlie species, with the greatest thickness in front of the navel, between the dorsal fin and the pectorals. In the fætuses from 75 to 84 centim. in length, a slight sinking of the outline of the body behind the head is apparent, but this may possibly be due to the preserving process. It does not appear in the 9o centim. long foetus. The pectoral fins, which are situated very low down, at the junction of the flanks with the abdominal surface, are niillim. long in the 84 centim. long iVetus, and amount t
. Bergens Museums skrifter. 22 The body has the elegant spindle shape characteristic of tlie species, with the greatest thickness in front of the navel, between the dorsal fin and the pectorals. In the fætuses from 75 to 84 centim. in length, a slight sinking of the outline of the body behind the head is apparent, but this may possibly be due to the preserving process. It does not appear in the 9o centim. long foetus. The pectoral fins, which are situated very low down, at the junction of the flanks with the abdominal surface, are niillim. long in the 84 centim. long iVetus, and amount to \ of the length of tlie body. Their convex ventral margin and concave dorsal margin with the angular convexity in its inmost tliird part, arc of tlie same cliaracter as in the full-grown animal. The umbilicus is under the middle of the dorsal tin. The penis is not withdrawn into any fold of skin, hut lies with the preputium right out. Half way between the glans and the anus, at the base of the prominence of the genital region, there are 2 clefts, each about 2 niillim. in length, lying side by side, which are the rudimentary mamnue. The postanal portion is very much compressed and higli, with a pronounced dorsal and ventral comb in the jiart lying immediately in front of the tail. The tail is deeply cleft, and the iiighly developed tail-lobes stretch out their points far beyond the cleft (fig. 2, p. 22). Distribution of colour. The black or blue-black colour is distributed over the whole of the dorsal surface of the body, and, in the tail region, over the ventral suriace also, extending forwards almost up to the anus: the pectorals are also black. The surface of the abdomen, on the other hand, is light or whitish. The upper jaw is also of a dark colour, with the exception of the lighter margin of the upper lip. The lower jaw, like the abdominal surface, is whitish. Three belts of colour may thus be distinguished on the body, viz. the almost black dorsal colour, the greyis
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Keywords: ., bookauthorbergensm, bookcentury1800, bookdecade1890, bookyear1894
