CONTENTS. 
XI 
PAG E 
Cuenot, L . — Function of Kidney of Helix 670 
Pelseneer, P . — Branchiate Pulmonates 670 
Haller, B . — Notes on Polyplacophora 670 
5. Bamellibranchiata. 
Knoll, Ph. — Muscle-Fibres of Mollusca . . 49 
Stauffacher, H. — Oogenesis and Segmentation in Cyclas 330 
Nagel, \V. A . — Sense of Light in Eyeless Bivalves 441 
Toureng — Circulatory System of Dreissensia polymorpha 442 
Wohrmann, S. yon — Systematic Position of Trigonidse 556 
Kishinouye, K . — Eyes of Cardium muticum 671 
Molluscoidea. 
a. Tunicata. 
Seeliger, O . — Origin of Peribronchial Cavity in Ascidian Embryos 50 
„ „ Formation of Mantle 50 
Herdman, W. A. — British Tunicata 50 
Heiden, H . — Ascidians of Minorca 51 
Borgert, A . — Neio Doliolum 51 
Metcalf, M. M . — Eyes and Subneural Gland of Salpa 183 
Apstein, C . — Salpx of Berlin Museum 183 
Traustedt, M., & W. Weltner — Tunicata collected by Dr. Sander 183 
Willey, A . — Evolution of Prxoral Lobe 330 
Caullery — Genital Products in Polyclinidx 330 
Salensky, W . — Metamorphosis of Distaplia magnilarva 330 
Todaro, F. — Visual Organ of Salpa 331 
Seeliger, O. — So-called Segmentation of the Tail in Appendicularia 442 
Caullery — Degeneration of Distaplia 442 
Lefevre, G . — Vertebration of Tail of Appendicularix 557 
Warham, A. E . — Variations in the Dorsal Tubercle of Ascidia virginea 557 
Caullery, M . — Budding of Diplosomidx and Didemnidx 671 
Gottschaldt, R . — Synascidix of Spitzbergen Expedition 671 
Ritter, W. E . — Perophora annectens 672 
B. Bryozoa. 
Prouho, H., & E. Ehlers — Contributions to our Knowledge of Poly zna .. ... .. 183 
Duerden, J. E . — New and Bare Irish Polyzoa 185 
V angel, E . — Bryozoa of Hungary .. 442 
Arthropoda. 
Perrier, E . — Arthropoda 51 
Hansen, H. J . — Morphology of Crustacean and Insect Appendages 52 
Kingsley, J. S . — Classification of Arthropoda 331 
Dana, J. D . — Derivation and Homologies of some Articulates 442 
Dixon, H. H. — Walking of some Arthropoda 557 
W agner, J . — Germinal Layers, Yolk Cells, and Embryonic Membranes of Arthropoda 67 2 
a. Insecta. 
Haase, C . — Mimicry 52 
Patrizi, M. L . — Muscular Action in Bombyx 52 
Auerbach, L . — Spermatozoa of Dytiscus 52 
Verhoeff, C . — Copulatory Organs of Male Hymenoptera 53 
Bordas — Male Genital Apparatus of Hymenoptera 53 
Ingenitzky, J . — Copulatory Organs of Libellulidx 53 
Lucas, R. — Mouth-parts of Trichoptera 54 
Boas, J. E. V . — Stigmata of Larva of Melolontha 54 
Camerano, L . — Bespiratory Movements of Coleoptera 55 
Scudder, S. H . — Orthoptera of Galapagos 55 
Child, C. M . — Antennary Sensory Organs of Insects 185 
