CONTENTS. XVI] 



PAGB 



Gemmill. James^F. — Double, Hyilrocoele of Starfish Larva 485 



„ „ Twin Gastrulx and Bipinnarise of Luidia sarsi 486 



Child, C. M. — Axial Gradients in Early Development of Starfish 486 



Painter, Theophilus 8. — Experimental Study of Cleavage in Sea-urchin Ova . . 486 



Dustin, A. P. — Artificial Parthenogenesis of Sea-urchin Ova 582 



Braohet, A. — Activation of Sea-urchin Ova 582 



Ccelentera. 



Light, S. F. — Nero Alcyonar ian Genus 41 



,, Philippine Scyphomedusm 41 



Broch, Hjalmar — Stylasterids 42 



Bali:. W. M. — Hydroids of the Great Australian Bight 42 



Morgan. W. de, & G. H. Drew — Restitution Masses formed by the Dissociated Cells 



of Hydroids 42 



Warren, Ernest — Development of Plumularian Planula 150 



Gravier, Ch. J. — Remarkable Longitudinal Scissiparity in a Madrepore .. .. 150 



Mayer, A. G. — Nerve Conductivity in Cassiopea 151 



„ Law Governing Loss of Weight in Starving Medusae 151 



Briggs, E. A. — Australian Alcyonarians 261 



Thomson, J. Stuart — Pennahdacese of the Cape of Good Hope and Natal .. .. 261 



Gravier, Ch. — Madrepore Corals from Great Depths 261 



A.RNuLD, G., & C. L. Boulenger — Fresh-water Medusoid from Limpopo River 



System 261 



Plessis, George dd (the late) — Fresh- water i I ydromedusoid 262 



v lachar, Thomas — Development of Mesenteries in Anthozoa .. .. .. .. 375 



Broch, Hjalmar — Gonophores of Tubularidse 375 



Rees, Oliven M. — Comparative Anatomy of »ome British Actinix 487 



Elmhirst, Ricahrd — Notes on Anemones 583 



Bigelow. Henry B. — Note on Medusan Genus Stomolophus 583 



Nutting, Charles Cleveland — American Hydroids 584 



Porifera. 



Annandale, Nelson — Sponges of Lake Baikal 152 



Ferrer, F. — New Sponges 152 



Dendy, Arthur — Gametogenesis of Grantia compressa 262 



,, „ Aphroceras cliarensis at Plymouth 264 



Annandale, N. — Symbiotic Sponges 264 



Annandale, Nelson — Indian Clionidse 376 



Hernandez, Francisco Ferrer — Sponges of Spain 376 



Muller, Karl — Gemmules of Ficulina and other Sponges 487 



Annandale, Nelson — Pectispongilla 48S 



Stephens, Jane — Sponges of the Coasts of Ireland 584 



Protozoa. 



MacKinnon, Doris L. — Amoeba of Larval Tipula 43 



Martin, C. H., & K. R. Lewin — Notes on Soil Protozoa 43 



Hoogenraad, H. R. — Rhizopods and Heliozoa, from Fresh-water in Holland .- 44 



Jameson, A. Pringle — New Phytofiagellate and its Division 44 



Dec. 15th, 1915 b 



