CONTENTS. XI 



PAOK 



Beebe, C. W.— Effect of Postponed Moult 442 



Allen, Glover M. — Pattern Development in Birch and Mammals 520 



Neumann, Fr. — Study of Hooded Fowls 530 



Svartz, Nanna — Nutrition of Striped Muscle 531 



Koaf, H. E. — Physiological Theory of Muscle Contraction 531 



Sanderson, E. D., & L. M. Pkairs — Temperature and Development 531 



Halnan, E. T., & F. H. A. Marshall — Relation between Thymus and Generative 



Organs 532 



Morgera, Arturo — Rectal Gland of Elasmobranchs and Appendix vermiformis in 



Man 532 



Ritchie, James — Fauna of a Coal-pit at Great Depths .. 532 



Lantzsoh, Kcrt — Nannoplankton of the Lake of Zug 533 



( olditz, F. V. — Plankton of the Manxfeld Lake 533 



Tunicata. 



Huntsman, A. G. — Protostigmata in Ascidians .. ., 162 



Duesberg, J. — Localization of Plastosomes in Ascidian Ovum 162 



Huntsman, A. G. — Origin of Ascidian Mouth 163 



Oka, A. — New Type of Compound Ascidian 163 



Flitton, "W. A.— Central Nervous System of Tunica nigra .. 249 



Meves, Fr. — Fertilization in Phallusia ;>33 



Caullert, M. — Regeneration and Budding in Diazona 534 



INVERTEBRATA. 



Mollusca. 



Cuenot, L. — Phagocytic Organs of Molluscs 443 



a. Cephalopoda. 



Garaieff, W. — Minute Structure of Argonaut's Food-canal 39 



Tippmar, F. B. — Minute Structure of Cuttlefishes 39 



Schkaff; Boris — Nervous System of Myopsidae 444 



•y. Gastropoda 



Meek, C. F. U. — Chromosomes in Snail 250 



Shaw, H. O. N. — Structure of Conus 250 



Kuhn, W. — Metabolism of Snail 250 



Eckardt, Ernst — Structure of Vitrinia 251 



Bzymowska, T. — Structure of Helix barbara . . . 345 



Cuenot, L. — Alleged Nematocysts of Pleurophyllidias 346 



Boszkowski, W. — Abyssal Fre*h-water Snails of the Lake of Geneva 444 



Brygider, W. — Salivary Glands <>f Nudibranchs 445 



Frank, E. J. — Structure of Trochidie 534 



Kimakowicz-Winnicki, M. v. — Study of the Clam ilium 535 



S. Lamellibrancliiata- 



Alverdes, Fr. — Structure of Pearls 40 



Siebert, W. — Epithelium of Anodonta cellensis 40 



Herbers, Karl — Development of Anodonta cellensis 163 



Schwanecke, G. — Vascular System of Anodonta cellensis 164 



