INDEX. t57 



J)rogress of, to the development of the brain, 99; effects of inlier 

 itance in production of, 100; complex structure of, among barbar- 

 ous nations, 103; natural selection in, 108; gesture, 203; primeval, 

 204; of a lost tribe preserved by a parrot, 206. 



Languages, presence of rudiments in, 102; classification of, 102; 

 variability of, 102; crossing or blending of, 102; complexity of, no test 

 of perfection or proof of special creation, 103; resemblance of, evi- 

 dence of community of origin, 169; languages and species, identity 

 of evidence of their gradual development, 102. 



Lanias, 525; characters of young, 529; laniiis rufus, anomalous 

 young of, 550. 



Lankester, E. R., on comparative longevity, 151, 155; on the de- 

 structive effects of intemperance, 155. 



Lanugo, of the human fetus, 21. 685. 



Lapponian language, highly artificial, 103. 



Lark, proportion of the sexes in the, 281 ; female, singing of the, 420. 



Larks, attracted by a mirror, 469. 



Lartet, E., comparison of cranial capacities of skulls of recent and 

 tertiary mammals, 62; on the size of the brain in mammals, 91; on 

 Dryopithecus, 177; on pre historic flutes, 650. 



Larus, seasonal change of plumage in, 561. 



Larva, luminous, of a Brazilian beetle, 314. 



Lamyx, muscles of the, in song birds, 421. 



Lasiocampa quercus, attraction of males by the female, 284; sexual 

 difference of color in, 358. 



Latham, R. G., on the migrations of man, 53. 



Latooka, perforation of the lower lip by the women of, 656. 



Laurillard, on the abnomal division of the malar bone in man, 44. 



Lawrence, W., on the superiority of savages to Europeans in 

 power of sight, 38; on the color of negro infants, 636; on the fond- 

 ness of savages for ornaments, 654; on beardless races, 662; on the 

 beauty of the English aristocracy, 670. 



Layard, E. L., on the instance of rationality in a cobra, 399; on 

 the pugnacity of Gallus Stanleyi, 412. 



Lay cock, Dr., on vital periodicity, 8; theroid nature of idiots, 41. 



Leaves, autumn, tints, useless, 296. 



Lecky, Mr., on the sense of duty, 111; on suicide, 132; on the 

 practice of celibacy, 135; his view of the crimes of savages, 135; on 

 the gradual rise of morality, 141. 



Leconte, J. L,, on the stridulant organ in the Coprini and Dynas- 

 tini, 344. 



Lee, H., on the numerical proportion of the sexes in the trout, 282. 



Leg, calf of the, artifically modified, 655. 



Legitimate and illegitimate children, proportion of the sexes in, 276. 



Legs, variation of the length of the, in man, 29; proportions of, in 

 soldiers and sailors, 36; front, atrophied in some male butterflies, 

 314; peculiarities of, in male insects, 314. 



Leguay, on the occurrence of the supra-condyloid foramen in the 

 humerus of man, 24. 



" Lek " of the black cock and capercailzie, 460. 



Lemoine, Albert, on the origin of language, 98. 



Lemur macaco, sexual difference of color in, 613. 



Lemurida?, 173; ears of the, 17; variability of the muscles in the, 

 46; position and derivation of the, 178; their origin, 188. 



