Index 



231 



Hydrogen peroxide, toxicity, 58, 92, 

 93; formation by sperm, 58, 117, 

 182; and X-ray action, 58; and 

 oxygen damage, 58 



Hydrogen sulphide, effect on sperm, 

 154 



Hydroxylamine, effect on sperm, 91 



8-Hydroxyquinoline, as metal-bind- 

 ing agent, 76 



Hyperpyrexia, relation to azoo- 

 spermia, 62 



Hypertonicity, as sperm-affecting 

 factor, 61-2 



Hypophysectomy, effect on semen, 

 145-6, 186 



Hypophysis, role in semen forma- 

 tion, 66, 145-9, 186 



Hypotonicity, as sperm-affecting 

 factor, 61 



Immunology of semen, 79-80 



Impedance changes, frequency in 

 semen, 41; relation to 'wave 

 motion' and conception rate, 

 41-2 



India-ink staining method, appli- 

 cation to sperm, 13 



Individual variations in the 

 composition of semen, 32-5, 137, 

 184, 191 



Indophenol reaction, 90-2 



Inhibitors of sperm motility and 

 metabolism {see also spermicidal 

 substances), 55-8, 91-2, 97-8 



Inner cylinder in the axial filament, 

 14 



Inosinic acid, dephosphorylation, 

 121 



Inositol, in semen and accessory 

 secretions, 16, 21, 189-92; role, 

 191-2 



Insectivora, copulatory plug, 28; 

 corpora amylacea, 132 



Insect sperm, transport, and sur- 

 vival in the female tract, 9; PAS 

 reaction, 12; activation by semi- 



nal plasma, 25; irradiation effects, 



59; fructose, 136 

 Insulin, effect on seminal fructose, 



146-8 

 lodoacetamide and iodoacetate, 



effect on sperm, 56, 58, 158 

 lodosobenzoate, effect on sperm 



56, 58, 177-8 

 lodospermine, 168 

 Ions and ionic equilibrium, 18, 23, 



25, 32-3, 42-4, 73-7, 188, 192 

 Iron, protein-bound in sperm, 88- 



93; relation to haematin and 



cytochrome, 89; in karyogen, 109 

 Irradiation effects, 58-60 

 Isoagglutinin, 71 

 Isoleucine, in mammalian semen, 



84, 113; in fish semen, 86, 106 



Jaffe's reaction, 1 79-80 



Jelly-coat of eggs, role in fertiliza- 

 tion, 71; dissolving-factor, 71, 

 95-6 



Jelly fish, sperm nucleic acid, 104 



Karyogen, in salmon sperm, 109 



Keratin-like protein, in sperm- 

 membrane, 110 



Key-hole limpet (Megathura crenu- 

 lata), egg-membrane lysin, 95; 

 nucleoprotein, 100 



Kinoplasmic droplet, 6-7, 154 



Lactic acid, content in semen and 

 accessory secretions, 21, 32-3, 

 36; as product of fructolysis, 46, 

 152-8; as substrate for sperm, 

 52-3, 153 



Lactic dehydrogenase, 158 



Lactose, and sperm metabohsm, 55, 

 152 



Lead salts, toxicity, 54 



Leakage of proteins from sperm, 

 10, 57, 83, 94^5 



Lecithin, in semen and accessory 

 secretions, 84, 124-5, 130-2 



