INDEX 



Abundance, fluctuations in, 79 

 Acatithoccphalus ratine, indication of 



underwater feeding, 96 

 Aggregations of tadpoles, 19-23 



bacterial population and chemical 

 environment, 22 

 Air currents and migration, 105-6, 



no, 114, 115 

 Algae, 26-8, 30-1, 45-6, 49 



enclosed in egg-jelly, 14 

 Algal hypothesis, 71, 105, 113, 139, 144 

 Altitude, effect of on spawning, 142 

 Alytes obstetrkans, 19, 167 

 Ambystoma maculatutn, no 

 Ameel, 58 



Amino-acids in tadpole nutrition, 47 

 Amplexus, drawings showing posi- 

 tions, 168-70 

 Analysis — 



correlation, 180-3, 186 



of variance, 185 

 Anas plaryrhynchos, 87 

 Andrewartha and Birch, 177 

 Anurans, safety of life of, 86 

 Arcella, 46 

 Areas — 



with abundant frogs, 78 



with no frogs, 78 

 Aronson, 164, 173 



Asellus aquaticus, indication of under- 

 water feeding, 96 

 Atrium of tadpole, function of, 53 



Baker and Nasr, 45 

 Balcells, i, 5 

 Bamett, B., 10 

 Barrington, 45 

 Barthelemy, 97 

 Beach, 120-1 



Beak of tadpole, use of, 49 

 Behaviour, breeding, 160-75 

 Beta coefficients, 144-5 

 Bierens de Haan, 154 

 Biggs and Macfarlane, 70 

 Blair, 65 

 Blanchard, no 

 Bles, 19, 50 



Blood-clotting, 10 

 Bogcrt, III 

 Botnbina — 



bombitia, 166 



variegata, 51, 95, 161, 166, 172, 173 

 Books, statistical, 182, 183 

 Boulenger, 68, 97 

 Bragg, 68 



Breder, Breder and Redmond, in 

 British Herpetological Society, 151 

 Brownlee, 183 

 Budgett, 114 

 Bufo— 



hufo, 40, 44, 48, 51. 67, 84-5, 96, 114, 

 161, 171-2, 174 



calamita, 68 



terrestris, in 



woodhousii, 68 



Cambar, 19 



Carbohydrate content of embryos, 16 



graph of, 17 

 Carp, digestion in, 45 

 Carpenter, 65 

 Catastrophes, regulators of abundance, 



16, 32, 38, 39, 40, 80, 81, 87 

 Cellulose digestion in tadpoles, 45 

 Cercariae, 58 



Chapman and Chapman, in, 114 

 Chi2, J85 

 Chlamydomonas, 51 

 Computers, electronic, 178 

 , Concrete, association with spawning, 

 15778 

 Correlation — 



analysis, 183 



coefficients, partial, 194 



coefficients of spawn date on weather, 

 143, 144, 146 



curvilinear, 208 

 Cott, 94, 96 



Crustacea, digestion by tadpoles, 47 

 Cuckoo, 178 

 Cummins, in, 164 

 Cuticular teeth, use of, 49, 50 

 Cyclops, 47 

 Czeloth, 113 



217 



