INDEX 



Abruzzese Sgarlata, S., 300 

 Absorption, 343, 344 

 Accessory cells, see Nurse cells 

 Acetabiilaria, 215 

 Acrosome 



cave, 137 



and egg membrane lysin, 57 



filament, 135 



insemination filament, 161 



in mammalian fertilization, 89, 

 122 



particle, 137 



physical properties, 151 



reaction, 24, 29, 140 

 Actin 



antigens, 300 



detection in chick blastoderms, 

 348 



efl^ects of antisera against, 356 

 Actively acquired tolerance, 351 

 Actomyosin, 304 



effects of antisera against, 356 

 Adams, C. E., 76, 86 

 Adelmann, H. B., 292 

 Adenosine triphosphate, 251 

 Afzelius, B. A., 137, 138, 142 

 Agarawal, S. C, 265 

 Agglutination 



calcium as aid to, 48 



of eggs, 49 



by fertiHzin, 24, 28, 31 



of mammalian sperm, 82, 88, 125 



mechanism of, 25, 31, 53 



reversal of, 33 



of sperm, 33 

 Agrell, I., 275, 280, 283, 284 

 Alden, R. A., 77 

 Alexander, J., 365 

 Alfert, M., 205 

 Altman's fluid, 274 

 Amoeba, 89, 194 



passage of RNA in, 16 

 Amoeba discoides, 209 

 Amoeba proteus, 209 



Amoeba sphaeronucletis, 209 

 Amoroso, E. C, 115 

 Amphibians, 86; see also Frogs 



cyclopic embryos in, 292 



dissociated cells of embryos, 366 



eggs of, effect of enzyme-inhibi- 

 tion on, 337 



embryos of, effects of antisera on, 

 356 



oocyte growth curves of, 5 

 Amy, R. L., 191-193 

 Anaerobiosis 



development in, 335 

 Andersen, D., 77 

 Anderson, J., 74, 126 

 Andres, G.^ 366, 369 

 Andrews, F., 77, 79 

 Animal halves 



dye reduction of, 279 



respiration of, 278 

 Animal pole 



metabolism at, 313 

 Animal-vegetal axis 



differences in particles along, 276 



gradient, 272, 279 

 Animalization, 272, 300 



agents, 298, 302, 307, 311, 312 



larvae, 291 

 Anophthalmia, 298 

 Anson, M. L., 35 

 Antagglutin 



for sperm, 83, 88, 126 

 Antibodies, 341 



cytotoxic activity of, 354 



in developing chick, 350 



developmental effects of, 345 



by embryo, fetus, and newborn, 

 349 



formation of, 365 



inhibitory effects of, 355 



natural, 350 



stimulating effects of, 354 



univalent, 55 

 Antifertility agents, 124, 125 



383 



