SUBJECT INDEX 



Acrosome, hyaluronidase in 99, 100; re- 

 action of invertebrate spermatozoa 100 



Activation of egg, by : sperm entry 22, 24 ; 

 other stimuli 36-39 



Adenine-8- 14 C 31 



Ageing of eggs, effects of 36, 43, 46, 85, 88 



Albumen coat in monotreme and marsupial 

 eggs 14, 102 



Alveoli in fish eggs 93 



Amitotic division 85 



Anaesthesia, ether, as: activating stimulus 

 38; stimulus to 'immediate cleavage' 77 



Androgenesis 38, 39 



Aneugamy 40, 41 



Artificial insemination late in oestrus 36, 43, 

 46, 85, 88 



Aster, in meiosis and mitosis 66; visible in 

 mammalian egg 45 (Fig. 31) 



Attachment of embryo in uterus (see Im- 

 plantation) 



Blastocyst, agents lethal to 82; composition 

 of fluid of 80, 81; development of 

 cytoplasmic processes from 81, 82; 

 histochemistry of 52, 61; morphology 

 of 4, 79-81, 83; outline of development 

 of 9, 12; parthenogenetic, in rabbit 38; 

 preparation of flat mounts of 109 



Block to polyspermy 22, 42 (Table 3), 43, 

 88, 89 



Capacitation 96, 99, 100; in vitro 123, 124 



Cell division, mechanism of 72, 73 



Centriole 66-69 



Centrosome, in oocyte 63; as part of divi- 

 sion apparatus 65-69; structure of 66 



Chemotaxis 114, 115 



Chorion of fish egg, change after sperm 

 entry 93 



Chromosomes (see also Genes), chiasmata 

 and 'crossing-over' in 16, 21, 23; divi- 

 sion of centromeres of, in meiosis 22 ; 

 lampbrush 16; nuclcolus-organizing 

 loci of 27, 28 ; reduction in number of, 

 during meiosis 21-23; scatter of, from 

 second meiotic spindle 24, 34, 35, 85; 

 X and Y 16, 68 (Fig. 59) 



in: cleavage nuclei 48-50; oocyte nuclei 

 16, 17, 19, 21; polar body 75; pronuclei 

 12, 25-27, 31, 44; sperm head 24 

 uniqueness of genotype of ootid 23 



Cinematography of eggs 6 



Cleavage (see also Blastocyst, Mitosis, 

 Morula, Vitellus), in monotreme eggs 

 84; inhibition of 79; mechanism of 72, 

 73, 78, 79; outline of 9, 12; rates of 83, 

 84 

 2-cell egg, development after destruction 

 of one blastomere 110, 130, 138; 

 'giant' 21; histochemical properties of 

 59-61; parthenogenetic 36, 38; resis- 

 tance to low temperatures 116, 117; 

 'smoke-ring' in 79; with two nuclei in 

 one blastomere 76, 77 

 4-cell egg, development after destruction 

 of one to three blastomeres 110, 132, 

 138; histochemistry of 59-61; par- 

 thenogenetic 38 

 8-cell egg, histochemistry of 59-61 ; 

 polyspcrmic 45 



Coats of marsupial and monotreme eggs 14 

 (Fig. 10), 102 



Colchicine 24, 36, 39, 41, 42, 46 



Cold shock 38 



Cortical granules 65, 93-95 



Culture and maintenance of eggs in vitro 6, 

 7, 117, 118, Appendix No. 2; as acti- 

 vating stimulus 38; at low tempera- 

 tures 116, 117 



Cumulus oophorus, appearance of 3, 97 

 (Fig. 74); as aid to sperm penetration 

 100; as check to early sperm penetra- 

 tion 98; as check to polyspermy 89, 

 100; break-up of 98, 99; chemical 

 properties of 98, 99; construction of 

 96, 97; effect of enzymes on 98, 99; 

 migration of follicle cells from 97, 98 ; 

 penetration of, by spermatozoon 99, 

 100; permeability of 98; state at ovula- 

 tion, and persistence of 96 

 relation of follicle cells to vitellus 97 



Cyclosis 58 



Cytaster 67, 85 



177 



