Zoologische Jahrbücher, 1904, Vol. 20 Buchkatalog

Excerpt from Zoologische Jahrbücher, 1904, Vol. 20: Abtheilung Anatomie und Ontogenie der ThiereExternal feätures. The outside of the Acmaeidce is almost too well known to need mention in this connection. But as Lottia differs in several respects from Acmaea short description is here appended. The shell varies from oval to elliptical in outline and when oval is broadest toward the posterior part. In specimens of average large size the length of the shell is 55 to 60 mm, by 45 to 50 broad, and 16 or 17 high. The peak is low and is situated well forward, which enables one to recognize the young animals at a glance. The outside of the shell is usually rather uneven from growth lines and. Faint ridges radiating from the peak. These show more plainly about the margin. The outer surface of the shell is a light brownish, or sometimes green from algae, but the muscle scar and mantle portion of the inner surface are dark rich brown, frequently disposed in zones of different intensity, and all more or less faintly iridescent. The color of the central portion is dull bluish white varied with brownish.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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.