A MANUAL OF ZOOLOGY FOR THE USE OF STUDENTS. WITH A General Introduction on the Principles of Zoology. BY HENRY ALLEYNE NICHOLSON, M.D., D.SC., M.A., PH.D. (GÖTT.), F.R.S.E., F.G.S. LECTURER ON NATURAL HISTORY IN THE MEDICAL SCHOOL OF EDINBURGH : VICE-PRESIDENT OF THE GEOLOGICAL SOCIETY OF EDINBURGH, ETC. AUTHOR OF ADVANCED TEXT-BOOK OF ZOOLOGY FOR THE USE OF SCHOOLS; ESSAY ON THE GEOLOGY OF CUMBERLAND AND WESTMORELAND;' CONTENTS. 762 BIOLORY General characters of the Vertebrata-Osseous system-Digestive sys- 323-339 General characters of Fishes-Integumentary system-Osseous system -Fins Respiration-Circulation - Digestive system- Swim- bladder-Nervous system-Olfactory organs-Reproduction, 340-352 Pharyngobranchii-Marsipobranchii,. Teleostei-Sub-orders-Malacopteri-Anacanthini-Acanthopteri— Ganoidei-Sub-orders-Lepidoganoidei-Placoganoidei, Elasmobranchii and Dipnoi-Sub-orders of Elasmobranchii—Holo- |