CONTENTS. Xlll 



Mollusca. t-^oB 



IMHOF, O. S. — Aquatic Mollusca of Switzerland 411 



Mobius, K. — Esthetic Appreciation of Molluscs 519 



a. Cephalopoda. 



ScHiMKEwrrsOH, Wl. — Effect of Reagents on Segmenting Egg* 29 



(J-arstaxg, W. — -Plague of Octopus 29 



Schimkkwitsoh, Wl. — Experiments on Eggs of Squid 146 



Kabl, Hans — G7j?-oma/op/wres of Cephalopoda 519 



Griffin, L. E. — Arterial Circulation of Nautilus pompili us 520 



y. Gastropoda. 



Wallace, W. S. — Locomotion of Fulgur 29 



Carazzi, D. — Development of Aplysia 30 



GuiART, J. — Tectibranchs 30 



Andre, Emile — Phylacites of Hyalina 146 



Woodward, M. F. — Structure of Pleurotomaria beyrichii 270 



Robert, A. — Cleavage in Trochus 270 



Vatssiere, A. — Monograph on Phurobranchidse 271 



H. Smidt — Ganglion-cells in the Gullet Musculature of Pulmonates 271 



Bouvier, E. L., & H. Fischer — Pleurotomaria beyrichi 411 



Robert, A. — Spawning and Oviposition in Trochus 412 



Hilgendorf, Franz — Variations of Planorbis 520 



Thiele, Joh. — Evolution of the Gastropod Form of Body 520 



Conklin, E. G. — Centrosome and Sphere in Crepidula 521 



Beegh, R. — Genus Harpa 521 



Smidt, H. — Structure of Neuroglia in Snail 521 



Prowazek, S. — Spermatogenesis in Helix pomatia 522 



Lacaze-Dcthiers, Henri de — Nervous System of Capulus hungaricus 522 



Plate. Ludwig H. — Anatomy and Phytogeny of Chitonidx 522 



Willcox, M. A. — Notes on Acmasa testudinalis 640 



Conant, H. 8. — Conchometer 641 



Heath, Harold, & M. H. Spaulding — New Pteropod 641 



5. Lamellibranchiata. 



Johnstone. J. — Structure of Cardium edule 146 



Hesse, Richard — Eyes of Mollusca 146 



Ihering, H. von— Cruciform Muscle of Tellinacea 147 



Meisenheijier, J. — Development of Dreissensia polymorpha Pall 271 



„ „ Development of Cyclas 272 



Bloomer, H. H. — Malformed Specimens of Anodonta cygnea 272 



Drew, Gilman A. — Development of Nucula delphinodonta 523 



Mitra, S. B. — Crystalline Style of Lamellibranchiata 641 



Arthropoda. 



a. Insecta. 



Supino, F. — Metamorphosis of the Blow- Fly 30 



Vanf.y, C. — Pupal Histolysis in Diptera 'M 



Berlese, Antonio — Role of " Phagocytes " in Insect Metabolism 31 



Henneguy, F. — Histolysis in Muscidx 31 



Bachmetjew, P. — Freezing of Body Fluids in Insects 31 



Dubois, R. — Silk of the Procession-Caterpillar 31 



Berg, C. — Alleged Termitophily 32 



Doerstling, P. — Aphis of the Sugar-Beet 32 



d'Hercclais, J. Kunckel — Colour-Changes in Locusts 32 



Xamben — Habits and Metamorphoses of Beetles 32 



Reh. L. — German Species of Aspidiotus 32 



Seurat, L. G. — Parasites of Oaks 32 



Wasmann, G. — New Genus of Flies 33 



