CONTENTS. Xlll 



PAGE 



Nekrassoff, A. — Maturation and Fertilisation in Cymbulia Peronii 303 



Smallwood, W. M. — Natural History of Haminea solitaria Say .. •• . •• •• 407 



Grosvenor, G. H. — Nematocysts of JEolids 407 



Chapman. F. — Valetozoic Pteropoda. 407 



Heath, Harold — Larval Eye of Chitons 408 



Nierstrasz, H. F. — Heart of Solenogastres .. .. 408 



Heath, H. — Habits of Selonogastres 523 



Kunkel, Karl — Habit* of the Cellar-Slug 523 



15onnevie, K. — Spermatogenesis in Enteroxenos Ostergreni 523 



Randles, W. B. — Anatomy and Affinities of the Trochidx 643^ 



Mader. M. — Muscular Fibres in Heart of Nassa reticulata 644 



Gkabau, Amadeus W. — Phytogeny of Fusus and its Allies 644 



Contagne, G. — Mendelian Phenomena in Gastropods 644 



Wissel, Curt vox — Chitons from the Pacific 644 



Fisher, W. K. — Anatomy of Lottia giga idea 644 



Heath, H, & M. H. Spaulding — Anatomy of Corolla (Cymbidiopsis) spectabilis .. 645 



5. Lamellibranchiata. 



Sassi, Moriz — Anatomy of Anomia ephippium 58 



Davenport, C B. — Variations in Pecten opercidaris 176 



Boutan, L. — Origin of Fine Pearls 177 



Dubois, R. — Secretion of Pearls • 303 



„ „ Detection of Pearls by means of X-Rays 303 



Rice, E. L. — Development of the Gill in Mytilus 304 



Anthony — Orientation of Trid.achnids within their Shells 304 



Bhutan, L. — Origin of Fine Pearls 408 



Marceau, F. — Adductor Muscles of Bivalves 523 



Anthony, R. — JEtlieriidx 524 



Herdman, W. A. — The Formation of Pearls .. .. 645 



Davenport, C. B. — Evolution of Pecten 645 



VigIer, P. — Muscular Fibre* of the Moll mean Heart 646 



^Arthropoda. 



Packard, A. 8. — Classification of Arthropoda 177 



Carpenter, G. H. — Relationships between Classes of Arthropoda 178 



Bruntz, L. — Excretion in Arthropods 304 



Lankester, E. Ray — Structure and Classification of Arthropoda 524 



«• Insecta. 



Wesche. W. — The Mouth-parts of ih<> Nemocera, and their Relation to the other 



Families in Diptera. (Plates III.-VIII.) 28 



Fabre, J. H. — Habits and Instincts of Insects .. 58 



Holmgren, N. — Viviparous Insects 59 



Courvoisier, L. G. — Variations in Lycsenidx 59 



Linden, Grafin von M. — Red and Yellow Pigment of Vanessa 59 



8chulz, W. A. — Hymenoptera of West Indian" Islands 60 



Holliday, Margaret — Ergatogynic Ants .. 60 



Gessner, E. Frey. — Males of Andrena 60 



Harris, W. H. — Habits of the Drone- Fly 60 



Taylor, T. H. — Habits of Chironomus 60 



Imms, A. D. — Marine Chironomid New to Britain 61 



Conklin. Edwin G. — Follicular Cells of Cricket 61 



Schulz, W. A. — Pelecinidse 61 



Davenport, C. B. — Collembola of the Beach 61 



Thayer, A. H.. & E. B. Poulton — Protective Coloration 62 



Theobald, F. V. — Economic Entomology 178 



Dickel, Ferd. — Sex- Determination in Bees 179 



Garbowski, Tad — Parthenogenesis in Porthesia 179 



