xvi CONTENTS. 



PAGE 



3I0ORE, A. R. — Heterogeneous Hybridizatio7i in Echinoderms GIO 



RuNNSTRoM, J. — Permeability of Sea-urchin Ova hy Stainn 017 



Reichensperger, August — Minute Structure and Regeneration in Crinoid:^ .. .. iiI7 



Reimers, K. — Histogenesis 0/ Synapta .. (JIT 



Ohshtma, HiROSHi — Study of Phyllophoriuie (JI7 



Coelentera. 



Pax, Fe^T). —Sea-anemones of Aru Islands 54 



Herouard, E. — Life-history of Chrysaora 54 



Fraas, E. — Kerunia and Hydractinia 55 



MiiLLER, Hermann — Eleutheria 55 



Yatsu. Nauhide — Ohservidions and Experiments on Ctenophore Ovum 55 



Harrison, Ruth, & S. J. HiOKSON — Madreporaria from Persian Gulf 189 



BouLENGER, C. L. — Variability of Fresk-tvater Mcdusoid 189 



Neumann, Hans — Axis of Alcyonarians 189 



Thomson, J. Stuart — South African G or gonacea 190 



Ritchie. James — Australian Hydroids 190 



Eraser, C. McLean — Hydroids of American West Coast 190 



Niedermeyer, Albert — Structure of Pteroides griseum ;!12 



Neumann, Hans — Axis of Plexaurids and Gorgnnids ;J12 



BouLENGER. C. li. — New Fresh-water Medusoid :!12 



SCHAXEL, J. — Changes of Chromatin in Oogenesis of I lydrozou ;!12 



LiPiN, A. — Polypodium hydriforme H13 



KoELlTZ, W. — Experiments on Hydra H13 



Herouard, E. — Pedal Cyst of Chrysaora 407 



Tayloh, 'V. H. — Study of Nematocy^ts 408 



Perez, Charles — Hermaphrodite Tubular ian 527 



Drzewina, A., & G. BoHN — Variation'^ in Eleutheria dichotoma .. .. .. 527 



Jordan, H. — Nervous System of Acra^peda (J17 



KiRKPA'i'RicK, R. — Stromatoporoids and Eozoon 018 



Yatsu, Naohtde — Germinal Localization in Beroe .. .. 018 



jMayer, A. G. — Ctfuophores of Atlantic Coaat of North A luerica 019 



Hahn, F. F. — Dictyonerna Fauna 019 



Porifera. 



Polimanti, O. — Association of Suberites and Dromia 56 



Huxley, Julian S. — Regeneration in Sycon.. 56 



liOHKHTSOfi. MvniEia— Division of Collar-cells <f (\ilcarea Jleteroccela 56 



Row, R. W.Harold — Red Sea Sponges 191 



Robertson, jMuriel — Division of Collar Cells in Calcareous Sponges 313 



VosMAER, G. (J. J. — Structurs of Spirastrella 313 



MiJLLER, K. — Regeneration in Sponges 314 



Stephens, Jane — Fresh-ivater Sponges of Clare Island 314 



„ „ Clare Island Sponges Oil) 



Hallmann, E. F. — Australian Sponges 619 



^ Protozoa. 



Brown. J. M. — British Rhizopods 57 



Wailes, G. H., & E. Pknard — Rhizopoda of Clare Island 57 



Cushman, J. A. — Foraminifera of the North Pacific 57 



Chapman, Fkedekick — Victorian Foraniinif era 57 



Souepotieff. A. — Xenophyophora of Indian Ocean .. .. 58 



Martin, C. H. — Nuclear Division of Large Aniceha from Liver Abscesses 58 



Faure-Kremiet, E. — Structure of Fahrea snlina 58 



