Memoirs of the Carnegie Museum, Vol. 6

Excerpt from Memoirs of the Carnegie Museum, Vol. 6: Catalog of Fossil Fishes From the Carnegie Museum; Part III. Catalog of Fossil Fishes From the Lithographic Stone of Cerin, FranceThe supplementary caudal fin in the form under discussion is relatively Shorter, that is, less produced backwards, than in other Species, and comprises eleven ¿exed and articulated rays above and below. A noteworthy feature is that the rays of the principal caudal are provided along their expanded lateral surface with a series of minute conical denticles, Similar to those occurring along the posterior border of the dorsal fin - rays of certain species of M acrosem'ius. The rays of all the fins are acutely pointed at their distal extremities. The posterior dorsal and anal fins comprise each about fifteen rays, are more acuminate than in other Species, and arise nearer the base of the caudal fin. The position of the pelvic and pectoral pair is indicated in the type-specimen, and the pair of elongated and slender basi pterygia, which are apparently fused, where they meet in an expanded distal process, are well displayed.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.