Index 



203 



limnodrilids, 55 



Limulus (see also king crabs), 41 



Littorina I it tor ea, reproduction, 134 



L. obtusata, reproduction, 134 



L. saxatilis, reproduction, 134 



L. veritoides, reproduction, 134 

 lizards, adaptations, 85 



on Krakatao, 46 



swift moving, 79 

 locomotion, 125, 143 

 locusts, activity, 90 

 lung-fishes (see also fishes) 



ancestors, 37 



excretion, 130 



in Am.azon, 60 



in fresh water, 93 



in mud, 35, 87 

 lungs, of ganoids, 110 



of vertebrates, 10, 99, 100, 103 

 Lycastris, in ground, 96 

 Lyner River, 28 



mackerel, oxygen used, 58 

 Macrophthalmus, 38 



respiration, 109 

 Macropsis slabberi, 29 

 maggot, rat-tailed, 84 

 magnesium, in sea water, 4, 73, 77 

 magnesium sulphate lakes, 44 

 mammals, 9 



body fluids, 76, 125 



excretion, 129 



hibernating, 85 



in deserts, 16 



light requirements, 90 



migrate to sea, 10 



respiration. 111 



teeth, 137 



man, energy, 147 



excretion, 130 

 manganese, in sea water, 42 

 mangroves, 26 



as intertidal zone, 60 



in estuaries, 25 

 marshes, 9, 17, 32 



drying up, %7 



oxygen, 34, 104 



salt, 33 



variabihty, 36 

 may-flies, nymphs, 102 



tropisms, 139 

 membranes, impermeable external, 



76 

 Menam Chao Phya, Siam, crab par- 

 asites, 141 

 Mersey River, 24 

 mesohalinophil animals, 29 

 metabolism, 122, 141 

 Metaplax, respiration, 109 

 mice, metabolism, 122, 124 



saltatorial, 79 

 migration (see also emigration) 



anadromous, 23 



causes, 49, 61 



seasonal, 23 



to the land, 20 



to the sea, 14 

 mites, littoral, 20 



parasitic, 140 



parasitic on crabs, 67 



water, ^7 

 Mithrax verrucosus, blood salinity, 



113 

 molar agents, affecting migration, 

 79 



