114 



Mutations and Evolution. 



Payes 

 in GEnothera, 6, 10, 



24, 27, 33, 42, 47 

 in ontogeny ... 78 



segmentation of, 31, 32 

 Sex, 9, 35, 38, 40, 53 



Supernumerary ... 17 

 Chromosome numbers, 



in Angiosperms ... 85 

 in Callitriche vertui 33 

 in Cornns glabrata 33 



in Crepis ... ... 88 



in Drosophila... 36, 53 

 in Gymnosperms 85 



in CEnothera, 6, 7, 



10,11,24,33,42,43,78 

 in Staphylea primata 33 

 in Tradescantia 



virginica 33 



Church 71 



Clintonia, pairs of species in, 55 



Cockayne 69 



Cockerell 71 



Colaptes, origin of species in, 55 

 Columba livia, wing-bars of 104 



Colombia 64 



Composite, evolution in 55 



Conklin 78 



Connecticut 68 



Convallariaceae... ... 55 



Convolvulus, double ... 62 

 Copepod larva ... ... 91 



Coreopsis tinctoria, 



variation in, 69 

 Cotnus glabrata ... 33 



Coulter 85 



Crampton 72, 73 



Crataegus multiformity 64 



Crepidula, reversal of 



symmetry in, ... 73 

 Crepis, chromosomes of, 88 

 Cretin, sweet pea, ... 18 

 Crossing-over 17, 18, 37 



Cruciate varieties, 



pollen formation in 47, 48 

 Crustacea, ancestor of, 90 



Cuba .. 52 



Cunningham 97 



Cycads, male prothallialcells, 86 

 Cypripediuni caudatum 64 



Dahlia, double ... 59 



Darwin, 1,2,4,66,81,96,103 



Pages 



Davenport 75 



Davis 16, 45, 82 



Dendy ... ... 97, 102 



Deutzia, double ... 62 



Dianthus, double ... 56 

 Dichromatism in birds 73 



Digby 82 



Digitalis, mutation in, 64, 67 



Digitalis pnrpurea montrosa 65 



heptandra ... 67 



nudicaulis ... 67 



pubescent ... 67 



Dioscoides 58 



Distribution 1, 55, 77, 100 



of Partula ... 72 



of Otus asio ... 100 



of Peromyscus ... 101 



Dodoens 58 



Dogs, hairless variety, 74 



Don 49 



Doncaster 36 



Dorippe dorsipes ... 75 



Doubleness, inheritance 



of, 47, 56 

 Doubling in flowers ... 47, 56 



Draba venm 64 



Drosera, natural hybrid 1 1 



dwarf variety 68 



Drosophila, chromosomes 



of, 8, 15, 53, 88 

 lethal factors in 45 



mutations in, 14, 15, 



19, 20, 47, 52, 67 

 non-disjunction in, 



8, 9, 17, 35 



Duerden ... 98, 104 



Duplicate factors, 



mutations, 12 



Dwarfs, Drosera ... 68 



Guinea-pigs ... 75 



Matthiola ... 58 



Partula ... 73 



Barnes 84 



Elasmobranch embryos, 79 



Empedocles 77 



Epharmosis 3 



Ephemeridae, modification 



for aquatic life, 89 

 Bpigaea, double ... 61 



Epilobium 47, 48 



Epipolasidse 102 



