Excerpt from The Danish Ingolf-Expedition, Vol. 2: The North-European and Greenland Lycodinae Other characters which might be taken into consideration, though not to so great an extent, are the relative height of the bod y (the dimension chosen in this work for the greater or less elongation is always the height over the anus, which is to some extent independent of distension caused by food or sexual products), the relative length of the head (which is nevertheless rather variable within the individual species, the males as a rule having longer heads than the females or young), size of the eyes, condition of the teeth etc. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.