Page:The Worst Journey in the World volume 1.djvu/118

Rh tions were made almost hourly throughout the daylight hours. Most officers and men knew the more common sea birds in the open ocean, and certainly of those in the pack and fringes of the Antarctic continent, which, with rare exceptions, is the southern limit of bird life.

A number of observations of whales, illustrated by Wilson, were made, but the results so far as the seas from England to the Cape and New Zealand are concerned, are not of great importance, partly because close views were seldom obtained, and partly because the whales inhabiting these seas are fairly well known. On October 3, 1910, in latitude 42° 17′ S. and longitude 111° 18′ E., two adults of Balaenoptera borealis (Northern Rorqual) were following the ship close under the counter, length 50 feet, with a light-coloured calf some 18-20 feet long swimming with them. It was established by this and by a later observation in New Zealand, when Lillie helped to cut up a similar whale at the Norwegian Whaling Station at the Bay of Islands, that this Rorqual which frequents the sub-Antarctic seas is identical with our Northern Rorqual; but this was the only close observation of any whales obtained before we left New Zealand.

General information with regard to such animals is useful, however, as showing the relative abundance of plankton on which the whales feed in the ocean. There are, for instance, more whales in the Antarctic than in warmer seas; and some whales at any rate (e.g. Humpback whales) probably come north into warmer waters in the winter rather for breeding purposes than to get food.

With regard to dolphins four species were observed beyond question. The rarest dolphin seen was Tersio peronii, the peculiarity of which is that it has no dorsal fin. This was seen on October 20, 1910, in latitude 42° 51′ S. and longitude 153° 56′ E.

Reports of whales and dolphins which are not based upon carcases and skeletons must be accepted with caution. It is most difficult to place species with scientific accuracy which can only be observed swimming in the water, and of