850 



INDEX 



Owen, Prot, on homologous organs, 



ii. 243 

 ■i , on the metamorphosis of cepha- 



k>pod8, li. 254 



PACino Ocean, faunas of, W. 139 



Pacini, on electric organs, I. 262 



Paley, on no organ formed to give 

 pam, i. 280 



Pallas, on the fertility of the domes- 

 ticated descendants of wild stocks, 

 u. 16 



Palm with hooks, 5. 273 



Papaver bracteatum, i. 298 



Paraguay, cattle destroyed by flies, 1. 

 111-112 



Parasites, i. 361 



Partridge, with ball of earth attached 

 to foot, iu 156 



Parts greatly developed, variable, i. 

 210 



Parus major, i. 246 



Passiflora, iL 12 



Peaches in United States, i. 12? 



Pear, grafts of, ii. 24 



PedicellariiE, i. 324-325 



Pelagomium, flowers of, i. 206 



, sterility of, ii. 13 



Pelvis of women, i. 204 



Peloria, I. 206 



Period, glacial, iL 169 



Petrels, habits of, i 247 



Phasianns oolchicus, and P. torquatus, 

 fertility of hybrids, ii. 15 



Pheasant, young, wild, L 356 



Pictet, Prof., on groups of species 

 suddenly appearing, ii. 83 



, on Tste of organic change, ii. 97 



• , on continuous succession of gen- 

 era, iL 100 



, on chai^ in latest totiary 

 forms, ii. 77 



Pictet, Prof., on close alliance of fossila 



in consecutive formations, ii. 122 

 , on early transitional liolts, ii. 



84 

 Pierce, Mr., on varieties of wolves, i. 



134 

 Pigeons with feathered feet and akin 



between toes, i. 37-38 

 , breeds described, and origin of, 



i. 47 

 , breeds of, how produced, i. 



67-68, 70 

 , tumbler, not being able to get 



out of egg, i. 129 



, reverting to blue color, i. 223 



, instinct of tumbling, i. 354 



, young of, iL 257-258 



Pigs, black, not affected by the paint 



root, i. 37 

 , modified by want of exercise, i. 



275 

 Pincers of crustaceans, i. 327 

 Pistil, rudimentary, ii. 266 

 Plants, poisonous, not affecting cer- 

 tain colored animals, i. 37 

 ■ ■ , selection applied to, i. 66 

 , gradual improvement of, i. 66- 



66 

 , not improved in barbarous COOD^ 



tries, i. 66 



, dimorphic, i. 78; iL 35 



, destroyed by insects, L 106 



— — , in midst of range, have to strug- 

 gle with other plants, L 117-118 



, nectar of, i. 137 



— — , fleshy, on sea-shores, L 191 



, climbing, i. 256, 332 



, fresh-water, distribution of, iL 



183 

 , low in scale, widdy distributed, 



iL 205 

 Pleuronectidse, their structure, L 317 

 Plumage, laws of change in sexes ci 



birds, i. 133 



