Illb. 4. 149 Illb. 4. 



D. Ribonucleic acid suply to germ cells and determinism Illb. 17. 



of meiosis. Asellus (Crust, hop.). G. VITAGLIANO 

 D. Determinism of meiosis. Acellus (Crust. Isop.) and other 



species. G. MONTALENTI 



J. Conditions of the maturation of the egg and ovulation. 

 Rana pipiens. M. ATLAS 



Ovi position. 



D. Biology of oviposition. Locusta. D. AGARWALA 

 Fertilization 



EV. Role of fertilizin and anti-fertilizin in fertilization: Me- IIIc. 2. 



chanism of adjuvant-fertilizin agglutination of starfish 

 sperm, specificity of antifertilizin in echinoids, aggluti- 

 nation of eggs and sperm by basic proteins. Various 

 marine invertebrates, including asteroid and echinoid 

 echinoderms. C. B. METZ 



EV. A study of the factors which cause initiation of develop- 

 ment. Arbacia punctulata (Echinoidea) and Chaetop- 

 terus pergamentaceus (Polychaeta). 



L. V. HEILBRUNN 



EV. Metabolic changes on fertilization. Arbacia punctulata, 

 Asterias forbesii and Chaetopterus pergamentaceus. 



H. SHAPIRO 



F. Fertilization reaction. Saccoglossus (Entet opneusta) . 1.4. 



A. L. COLWIN and Mrs L. H. COLWIN Ilia. 4. 



G. Enzymatic destruction of jelly coat substances of the 

 eggs. Echinus esculentus, Echinocardium cotdatum, 

 Brisopsis lyr., etc. J. IMMERS 



G. Studies on the chemical composition and the species 

 specificity of its chemical composition. Action of dis- 

 solved jelly coat substance (fertilizin) on the sperma- 

 tozoa. Paracentrotus lividus, Psammechinus miliaris and 

 other sea urchins. E. J. E. VASSEUR 



G. Investigation on the nature of the sperm-factor which 

 brings about the fluidification of the jelly layer sur- 

 rounding the eggs. Echinoderms. 



LUNDBLAD and A. MONROY 



G. On fertilizability of the egg under different conditions 

 acting on sperm and eggs. Psammechinus miliaris, 

 Strongylocentrotus droebackiensis and Arbacia lixula. 



Miss E. WICKLUND 



G. Biochemistry of fertilization, espec. on carbohydrate 

 metabolism. Echinus esculentus, Echinocardium corda- 

 tum. Strongylocent. droeb., Paracentrotus lividus, etc. 



J. IMMERS 



G. Changements of dehydrogenase system at fertilization 

 of the sea urchin egg. P. E. LINDAHL 



G. Investigations on the biochemistry of fertilization in sea 

 urchin eggs with special consideration to the changes 

 occuring in proteins. A. MONROY 



