Xll CONTENTS. 



y. Gastropoda. 



PAGI 



Boycott, A. E., & J. W. Jackson — Apparent Absence of S( xual Characters in Shell 



of Neritina fluviatilii 22 



Imlsman, H. C. — Development of Periwinkle 137 



Artom. Cksakk — Cell* with Double Nuclei in Spermatogenesis of Paludina vivipara 246 



Hennegut, L. F.— Epithelial Cells of Solids 354 



Odhneb, Nils Ht. — New Arctic Opisthdbranch 571 



5. Lamellibranehiata- 



Porstek, J. — Luminous Organs and Nervous System of Pholas dactylus 22 



Matthias, .Martin — Alimentary Sy»tem and Heart of Area 247 



Massy, Anne L. — Estimating Age of Oysters .. 248 



Howard, A. D. — Reproduction of Fresh -mater Mussels 354 



„ „ Hosts of Glochidia 356 



Arthropoda. 



McIndoo, X. E. — Olfactory Sense in Hymenoptera and Spiders 138 



Thompson, W. R. — Phagocytic Reaction in Arthropods 572 



a. Insecta. 



Smith, Geoffrey, & A. H. Hamm — Stylopization 23 



Taylor, Monica — Chromosome Complex of Cnlex pipiens 24 



Narcissus Flies 24 



Whiting. Thineas W. — Bristles of Greenbottle Fly 25 



Hewitt. T. R. — Larva and Pupa of Frit-fly '25 



Harrison, J. W. H., & L. TJoxcASTEK—Gametogenesis in H ybrid Motlts .. .. 25 



Smollian, Kurt — Variability of Tiger Moth 27 



Abbott, James Francis — Mimicry in Genus Limenitis 28 



Chapman, T. A. — Life-history of Agriades thersites 29 



Bethune-Baker, G. T. — Genital Armature in Lepidoptera 29 



Bowater, W. — Heredity of Melanism in Lepidoptera 29 



Lehr, Richard — Sense- organs of Dytiscus Wings 29 



Stellwaag, Fr. — Mechanism of Flight in Lamellicorns 30 



Cummings, Bruce F. — Scent-organs in Caddis-flies 30 



Bagnall, R. S. — Tertiary Thysanopteron 30 



Glasgow, H. — Gastric L'seca of Heteroptera 30 



Awatj, P. R. — Suction in Potato Capsid Bug 31 



Carpenter. G. H. — Injurious Insects in Ireland 31 



Munro, J. W. — Braconid Parasite of Pine-weevil . . 31 



Cameron, A. E. — Life-history of Belladonna Leaf miner 31 



Ehrhardt, R. — Myrmeeophilous Organs of Larval Lycxna orion 140 



Verity, Roger — Variations in Italian Lepidoptera 141 



Cornetz, V. — Nocturnal Ohservations on Ants 141 



Wickham, H. F. — New Miocene Coleoptera from Florissant 142 



Warren, Ernest — New Termitophilou* Beetle 143 



Kellogg, V. L., & J. H. Paine — Indian Mallophaga 143 



Carl, J. — Phasgonurids of Tonkin 143 



Dexter, John S. — Beadea '-wingrd Variation in Drosophila 143 



Morgan, T. H. — Failure of Ether and Radium to produce Mutations in Drosophila 144 



