INDEX 



205 



Nitrogenous excretion 



125, 126 

 Noradrenaline 157 



45-68, 



Octolasium 22, 42 

 Omnivorous habit 18 

 Ornithine 61 

 Osmotic pressure 75 

 Oxygen debt 90 



Param^'osin 9 

 Peloscolex 108, 109, 111 

 Perichaeta 4, 119, 142, 179 

 Peristalsis 142-145, 150, 168 

 Phagocytosis 58, 98 

 Pheretima agrestis 175 



commiinissima 8, 23 



diver gens 23 



hazvayana 89, 104 



hilgendorffi 38 



posthuma 2, 20, 65, 67, 73, 119 

 Phosphagen 5, 16 

 Phospholipids 57, 121 

 Photoreceptors 1 72 

 Pontoscolex 89 

 Post-synaptic potentials 163 

 Prostomium 144 

 Protease 20, 22, 26, 154 

 Proteins 4, 66 

 Protoporphyrin 9-11, 65 

 Protoscolex 104 

 Purines 57 

 Pyruvic acid 110, 123 



Qio of respiration 88-89 



Reflex arc 151-153 



Regeneration 1 1 8-1 27 

 effect of cyanide 124 

 effect of drugs 120,121 

 electrical gradients 39, 119 

 excretion 125, 126 

 importance of CNS 118, 134 

 number of segments 40,122 



Repetitive firing of giant fibres 



162 

 Reproduction 132-133 

 Respiration 83-117 



cellular respiration 108-117 

 effect of carbon monoxide 100, 



108 

 effect of cyanide 39, 108, 123 

 effect of drugs 89, 90 

 effect of partial pressure of 



oxygen 92-94, 124 

 in regeneration 121 

 rates of isolated tissues 36-38, 



41 

 rates of whole animals 87, 88 

 rhythms 90 

 tropical species 88, 89 



Salivary glands 20 



Secondarv sex characters 131, 



132 ' 

 Sense organs 165-167 

 Sensory fields 141 

 Sensory input to giant fibres 159 

 Septa of giant fibres 163-165 

 Serine 116 



Serine-diethyl-phosphate 114 

 Solid content 38 

 Sterols 4, 5 



Stretch receptors 147, 149 

 Stylochiis 39 

 Succinate 111 

 Succinoxidase 42, 122 

 Sub epidermal network 168 

 Sub oesophageal ganglion 1 29-1 3 5 

 Sulphur content 38 

 Surface area and respiration 93, 94 

 Survival time in waterlogged soils 



71 

 Synaptic properties 151-153 



Temperature 



effect on behaviour 172 

 effect on CNS 169 

 effect on blood system 97 



