XU 
CONTENTS. 
INVERTEBRATA. 
I'AGE 
Newbigin, M. I . — Chlorophylloid Pigments 27 
Steiner, J . — Nervous System of Invertebrates 27 
Thon, C . — Fauna of Frog Spawn 588 
Mollusca. 
Cuenot, L . — Excretion in Mollusca 386 
MacMunn, C. A . — Gastric Gland of Mollusca and Decapod Crustacea 478 
Steinmann, G. — Shell-making and the Origin of the Dark Pigment 478 
Diguet, Leon — Formation of Pearls . . 479 
a. Cephalopoda. 
Solger, 13 . — Chromatophores of Cuttlefishes 28 
Sarasin, P. & F . — Freshwater Molluscs of Celebes 274 
Griffin, L. E . — Tentacles of Nautilus pompilius 479 
y. Gastropoda. 
Mazzarelli, G . — Anal Kidney of Larval Opisthobranchs 28 
•Conklin, E. G . — Dimorphism in Crepidula 153 
Howe, J. L.— Variations in the Shell of Helix nemoralis 154 
Boutan, Louis — Habits of Eolis papillosa 154 
Pilsbry, H. A . — Functions of the Radula 154 
Lacaze-Duthiers, Henri de — Nervous System of Gasteropods 274 
Willcox, M. A . — Anatomy of Acmsea fragilis 275 
Biedermann, W., & P. Moritz— Cellulose-dissolving Ferment in Snail 275 
Viguier, Camille — Development of Tethys fimbriata 275 
Moore, J. E. S . — Molluscs of Great African Lakes 386 
Conklin, E. G . — Dimorphism in Molluscs 387 
Meisenheimer, Johannes — Primitive Kidney of Pulmonates 387 
Cunningham, J. T. — Egg-capsules of Gastropoda 388 
Guiart — Phytogeny of Gastropods 480 
Camus, L . — Agglutinative Action of Snail’s Albumen Gland 588 
Biedermann, W., & P. Moritz — Function of Gastric Gland in Snail 588 
Lenssen — Anatomy of Neritina jluviatilis 589 
Tonniges, C . — Development of Paludina vivipara 589 
Heath, Harold — Development of Chiton .. .. 589 
5. Lamellibranchiata. 
Faussek, Victor — Pigment-formation in Lamellibranchs 28 
Boutan, Louis — Artificial Production of Pearls 28 
Pelsener, Paul — Cephalic Eyes in Lamellibranchs 29 
Pelseneer, Paul — Cephalic Eyes of Lamellibranchs 388 
Drew, G. A . — Contributions to our Knowledge of the Protobranchia 590 
Surbeck, Georg — Swiss Fresh-water Molluscs 590 
Arthropoda. 
Bordage, Edmond — Regeneration in Arthropods 591 
Silvestri, Filippo — Arthropods from Chili 1 591 
a. Insecta. 
Piepers, M. C. — Colour -Evolution in the Pieridae 29 
Garbowsky, T . — Coloration of Insects 30 
Linden, Maria von — Development of Markings of Butterflies 30 
Baer, M . — Coloration of Lepidoptera 30 
Janet, Charles — Sting of Ants 31 
