The Anatomy Physiology Of The Blowfly Musca Vomitoria Linn

Excerpt from The Anatomy Physiology of the Blow Fly (Musca Vomitoria Linn, ): A Monograph In submiting the following pages to the scientific world, although I do so knowing their many shortcomings, I trust there is sufficient that is new to make amends for any slight inaccuracies, which could, perhaps, hardly have been avoided, since so little has been done to pave the way for the present investigation. The Plates, which form no inconsiderable feature in this Work, have been carefully executed on copper, by myself; and I have spared no trouble to make them as perfect as possible. I have endeavored to give prior authorities for my statements as often as possible, except when the facts are well known, but much work upon the anatomy of insects is so scattered that it has often not been in my power to discern whether I am entitled to priority of discovery. 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.

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1870 edition. Excerpt: ... Section II.--The Proboscis. Plate II. Figs. 3--15. Plate III. The proboscis is one of the most remarkable and complex structures found in the insect world; it consists of three joints, each of which represents a distinct segment. Its hard parts are the homologues of those usually found in the mouths of insects, and although they are greatly modified to serve special purposes, yet, owing to the elongated nature of the organ, the several segments are perhaps more decidedly distinct in the fly than in any other insect. The integument of the basal joint consists chiefly of a funnelshaped membrane continuous with the antennal segment around the oral cleft; a semi-transparent trapezoidal plate of chitine, the epistoma, which forms a hinge with the facial plate, is developed upon its dorsal surface, (it is represented in outline in Plate II. Figs. 11 and 12). Connected with the inferior edge of this and almost entirely enclosed within the funnel-shaped integument, a very complicated organ is found; it is the largest piece in the proboscis, and forms a fulcrum upon which all the other parts move. It gives attachment to five pairs of muscles and guides all the movements of the basal joint, which is otherwise membranous. The walls of this organ are double, and the two plates are kept in apposition by their elasticity, but are capable of being separated and of forming a cavity by the action of a pair of large muscles, the cavity so produced being continuous In order to avoid repetitions, it is to be understood that the words dorfal and ventral, as applied to the proboscis, relate to the surfaces which assume those positions when the organ is extended and drawn forward; anterior and posterior likewise refer to the same position of the organ, that...