A TEXT-BOOK of VETERINARY ANATOMY BY SEPTIMUS SISSON, S.B., V.S. PROFESSOR OF COMPARATIVE ANATOMY IN OHIO STATE UNIVERSITY, COLUMBUS, OHIO MEMBER OF THE AMERICAN ASSOCIATION OF ANATOMISTS _WITH 588 ILLUSTRATIONS MANY IN COLORS_ PHILADELPHIA AND LONDON W. B. SAUNDERS COMPANY 1911 COPYRIGHT, 1910, BY W. B. SAUNDERS COMPANY Reprinted July, 1911 PRINTED IN AMERICA PRESS OF W. B. SAUNDERS COMPANY PHILADELPHIA TO KATHERINE OLDHAM SISSON IN GRATEFUL RECOGNITION OF CONSTANT INSPIRATION AND ENCOURAGEMENT THIS BOOK IS DEDICATED BY THE AUTHOR PREFACE The lack of a modern and well-illustrated book on the structure of the principal domestic animals has been acutely felt for a long time by teachers, students, and practitioners of veterinary medicine. The work here offered is the expression of a desire to close this gap in our literature. The study of frozen sections and of material which has been hardened by intravascular injection of formalin has profoundly modified our views concerning the natural shape of many of the viscera and has rendered possible much greater precision in topographic statements. The experience of the author during the last ten years, in which almost all of the material used for dissection and for frozen sections in the anatomical laboratory of this University has been hardened with formalin, has demonstrated that many of the current descriptions of the organs in animals contain the same sort of errors as those which prevailed in regard to similar structures in man previous to the adoption of modern methods of preparation. While the method of treatment of the subject is essentially systematic, topography is not by any means neglected either in text or illustrations; it is hoped that this will render the book of value to the student in his clinical courses and to the practitioner. Embryological and histological data have been almost entirely excluded, since it was desired to offer a text-book of convenient size for the student and a work of ready reference for the practitioner. It is believed that the use of black type for the names of important structures and of small print for certain details or matter of secondary importance will prove useful in this respect.