CONTENTS. XU1 



Cyon, E. von — Japanese Dancing Mice (561 



Kathariner, Ludwig — Nostrils of Aquatic Snakes .. 661 



Warren, Earnest — Variation in Frog 661 



Osborn, H. L. — A Remarkable Axolotl 662 



Greene, C. W. — Caudal Heart of the Hagfish 662 



Lyon, E. P. — Compensatory Movements of the Eyes in Fishes 662 



Williamson, H. C. — Races of Mackerel 662 



Kyle, H. M. — Natural History of the Plaice 663 



Flat Fishes 663 



Young, R. T., & L. J. Cole — Nesting Habits of Brook Lamprey 664 



Zoological Yearbook ' .. 664 



Tunicata. 



Korotneff, Alexis — Embryology of Salpa 35 



Hartmeyer, Robert — Simple Ascidians from Spitzbergen 35 



Bancroft, F. W. — Vascular Ampullse in Botryllidx 36- 



Longchamps, Marc de Selys — Branchial System of Ascidians 36 



Bancroft, F. W. — Oogenesis in Tunicates .. .. 188 



St. Golski — Maturation and Fertilisation in Ciona intestinalis 18S 



Sluiter, C. Ph. — Pacific Tunicata 314 



Harmer, S. F. — Balanoglossus as a Generic Name 315 



Caullery, Maurice — New Composite Clavelinid 453 



Seeliger, Oswald — Structure of Tail in Appendicularidse 453 



Damas, D. — Branchial Sac in Ciona intestinalis 664 



INVEBTEBRATA. 



Lonnberg, Einar — Notes on the Fauna of the Caspian Sea 575 



Schorler, B. — Plankton of the Elbe 664 



Kofoid, 0. A. — Plankton of Mammoth Cave 665 



Mollusca. 



Balch, F. N. — Bionomics of Mollusca 188 



a. Cephalopoda. 



Schimkewitsch, W. — Experiments on Squid Eggs 36 



Faussek, Victor — Development of Cephalopoda 575 



Smith, J. P. — Development of Placenticeras 665 



y. Gastropoda. 



Buchner, O. — " Varieties" of Helix pomatia 37 



Ellermann, W. — Intestinal Epithelium of Helix 37 



Smidt, H. — Sensory-cells of Helix 37 



Havet, J. — Nerve-cells of Umax 38 



Kunkel, Karl — Water Absorption in Slugs 38 



Holmes, S. J. — Reversal of Cleavage in Ancylus 38 



Bush, K . J. — Marine Gastropods 39 



Creighton, Charles — Glycogen in Snails and Slugs 189 



Grobben, Karl — Origin of Asymmetry of Gastropods 189 



Bouvier & Fischer — Anatomy of Pleurctomaria 190 



Haller, B. — Gonads and Nephridia of Prosobranchia 190 



Pilsbry, H. A. — Relations of Land Molluscan Fauna of South America .. .. 191 



Lenssen, J. — Structure of Neritina 191 



Carazzi, D. — Cell-lineage in Aplysia 315 



Mazzarelli, G. — Morphological Notes on Tectibranchs 315 



Smidt, H. — Sensory Cells in Mouth-cavity of Helix 316 



„ „ Histology of Nervous System in Helix 316 



Pfeiffer, Wilhelm — Anatomy of Triboniophorus 316 



Dautzenbeug, Ph., & H. Fischer — New Abyssal Gastropod 316 



Pruvot, G. — Two New Neomenians 317 



