Bulletin of Museum of Comparative Zoology 19-2

BULLETIN OF THK MUSEUM OF COMPARATIVE ZOOLOGY AT HARVARD COLLEGE, IN CAMBRIDGE VOL XIX CAMBRIDGE, MASS., U.S.A 1890 Reprinted with the permission of the original publisher KRAUS REPRINT CORPORATION New York 1967 Printed in U.S.A CONTENTS Page No 1.— Contributions from By Lepidosteus No E L — Contributions Mark No Zoological Laboratory (9 Plates.) of some Osseous XV Studies on February, 1890 from the Zoological Laboratory Membranes and Micropyle (3 Plates.) the Fishes By XVI On C H the Egg Eigenmann March, 1890 129 — Report on the Results of Dredging by the United States Coast " Steamer Blake." XXXII Report on the Nudibranchs By R Survey Bergh No —A (3 Plates.) March, 1890 Third Supplement to the Fifth 155 Volume of the Terrestrial Air- Breathing Mollusks of the United States and adjacent Territories W G Binney (11 Plates.) May, 1890 By 183 No — Studies on Lepidosteus Part By I Mark E L Contents Page Introduction I Young Fishes The Respiratory Function Habits of the II III Egg Membranes A Observations of lous Layer Micropyle Granulosa c d the Literature on the Primary Egg Membranes and the Mi- 54 a Cyclostomata 27 b Selachii 60 23 c Ganoidei 63 d Dipnoi 66 Teleostei 67 28