INDEX OF SUBJECTS 



253 



Lychnis dioica and vespertina, in- 

 ter-relations of 18 



macrocarpa, possibly a common 



parent of 19 



Machetes pugnax, polymorphism of 



male 28 



Maize, Blaringhem's experiments 



on. 229 



Maize, cumulative factors in 116 



Malformations, dominants, arising 



de novo 89 



Manx Cat, heredity 46 



Matthiola 84, 104, 113 



Melanic varieties 135, et seq. 



Memory, analogy with heredity. . . 190 



Meristic variation 69, 83, 86 



Mirabilis, striped 57 



Models of segmentation 59, 60 



" Modes," Coutagne's conception of 126 

 Modling, peculiar race of Pieris 



napi at 178 



Mole, albino 27, 28 



Mule, Linnaeus on 8 



Mutation, Matthioli on 4 



in Mercurialis 5 



in Kales 5 



alleged in bulbs 5 



Theory 97 



periods of 114 



in Bacteria 214 



Mutilation, consequences of 71 



alleged effect of, on offspring. . . 229 



Myxococcus, variation in 213 



Narwhal, asymmetry of tusks. ... 44 



Nemesia strumosa 91 



Neuration, a basis for classification 13 



Nicotiana, sterility of hybrid 242 



Nightjars, varying 150 



Noctuidae, fixity and variability. . 25 

 Noctua, polymorphic and fixed 



species 25 



Noctua castanea, local forms of . . . 122 



Nomenclature, future of 94, 245 



Notonecta, variations of 130 



Odontoptera bidentata, melanic 



form 137 



Oedipodidae, protectively coloured 140 



Oenothera, new dominant in 92 



rubricalyx and rubrinervis 92, 95 



Lamarckiana 92, 101 



origin of 102, 244 



has bad pollen-grains 102 



factorial analysis of 103 



pollen and egg-cells genetically 



dissimilar 104 



Oenothera, "twin hybrids" 105 



laeta and velutina 105 



reciprocal crosses in 105, et seq. 



possible coupling in m 



dwarfs 1I2 , 114 



"Triple hybrids" 114 



alleged variation due to treat- 

 ment 227 



Ophrys, local variability 125 



Orange, polyembryony 45 



Osmotic growth 65 



Overlapping forms 146, 174 



Papilio, geographical races of 162 



Papilio turnus, variation of 144 



Pararge egeria, geographical forms 



166 et seq. 



Parthenogenesis 50 



Partula, local forms of 133 



Passer domesticus and montanus, 



distinctions 22 



Pea, round and wrinkled 95 



Pear, will not cross with apple 239 



Pelargonium, variegated 55 



bud-sports 56 



Periodic phenomena in structure. . 63 



Peronea, fixed and variable species 26 



" Petites especes" 248 



Petunia, double 104 



Phalanger maculatus, local varia- 

 tion 119 



Pheasant, fixity of 29 



Phigalia pilosaria, melanic. . . .139, 140 



Phratora vitellinae, experiments on 193 



Phyllotaxis 69 



Pied varieties common in Passer 

 domesticus unknown in Mon- 

 tanus 23 



Pieris napi and bryoniae. ... 174, et seq. 



Pig, mule-footed 46 



Pigeon, web-footed 46, 49 



Indian Rock, a recessive form ... 98 



Pigments, nature of 83 



Pisum humile, hybrids with culi- 

 nary peas 244 



species 246 



Planar ian, regeneration of 71, 77 



Plotheia frontalis, polymorphic. .26, 29 



Plusia, fixity and variation in 26 



Poephila gouldiae, variation of . 148, 149 



Polarity of individual 44 



Polia chi, melanic 138 



Polyanthus, short-styled selected . . 236 



Polydactylism in Cat 52. 53 



Polyembryony 45 



Potato, variation in 91 



Poultry, evolution of 90 



Primula obconica 91 



