460 
ROBIN. 
INDEX. 
SANDWICH. 
Eobin, pugnacity of the male, ii. 40 ; 
autumn song of the, ii. 54 ; female, 
singing of the, ii. 54 ; attacking 
other birds with red in their plu- 
mage, ii. Ill ; young of the, ii. 
208. 
Eobinet, on the difference of size of 
the male and female cocoons of the 
silk-moth, i. 346. 
Eodents, uterus in the, i. 123 ; ab- 
sence of secondary sexual characters 
in, i. 268 ; sexual differences in the 
colours of, ii. 286. 
Eoe, winter change of the, ii. 299. 
Eolle, F., on the origin of man, i. 4 ; 
on a change in German families 
settled in Georgia, i. 246. 
Eoller, ii. 56. 
Eomans, ancient, gladiatorial exhi- 
bitions of the, i. 101. 
Eook, voice of the, ii. 61. 
Eossler, Dr., on the resemblance of 
the lower surface of butterflies to 
the bark of trees, i. 392. 
Eostrum, sexual difference in the 
length of, in some weevils, i. 255. 
Eudimentary organs, i. 17 ; origin 
of, i. 32. 
Eudiments, presence of, in languages, 
i. 60. 
Eudolphi, on the want of connexion 
between climate and the colour of 
the skin, i. 241. 
Euff, supposed to be polygamous, i. 
270; proportion of the sexes in 
the, i. 306 ; pugnacity of the, ii. 
41, 48 ; double moult in, ii. 81, 
84; duration of dances of, ii. 100; 
attraction of the, to bright objects, 
ii. 111. 
Euminants, male, disappearance of 
canine teeth in, i. 144, ii. 325 ; ge- 
nerally polygamous, i. 266 ; analogy 
of Lamellicorn beetles to, i. 373 ; 
suborbital pits of, ii. 280 ; sexual 
differences of colour in, ii. 287. 
Rupicola crocea^ display of plumage 
by the male, ii. 87. 
Euppell, on canine teeth in deer and 
antelopes, ii. 258. 
Eussia, numerical proportion of male 
and female births in, i. 301. 
Ruticilla, ii. 180. 
EijTiMEYER, Prof., on the physiogno- 
my of the apes, i. 149; on the 
sexual differences of monkeys, ii. 
323. 
Eutlandshire, numerical proportion 
of male and female births in, i. 
301. 
S. 
Sachs, Prof., on the behaviour of the 
male and female elements in fertili- 
sation, i. 274. 
Sacrifices, Human, i. 182. 
Sagittal crest in male apes and 
Australians, ii. 319. 
Sahara, birds of the, ii. 172 ; animal 
inhabitants of the, ii. 224. 
Sailors, growth of, delayed by con- 
ditions of life, i. 114; long-sighted, 
i. 118. 
Sailors and soldiers, difference in the 
proportions of, i. 116. 
St. John, Mr., on the attachment of 
mated birds, ii. 108. 
St. Kilda, beards of the inhabitants 
of, ii. 321. 
Salmo eriox, and 8 , umhla, colouring 
of the male, during the breeding 
season, ii. 14. 
Salmo lycaodon, ii. 4. 
Salmo sala7% ii. 4. 
Salmon, leaping out of fresh water, 
i. 83 ; male, ready to breed before 
the female, i. 260 ; proportion ^of 
the sexes in, i. 308 ; male, pugna- 
city of the, ii. 3 ; male, characters 
of, during the breeding season, ii. 
3, 14; spawning of the, ii. 19; 
breeding of immature male, ii. 
215. 
S ALVIN, 0., on the Humming-birds, i. 
269, ii. 168 ; on the numerical 
proportion of the sexes in Hum- 
ming-birds, i. 307, ii. 221 ; on Cha- 
msepetes and Penelope, ii. 64 ; on 
Selasphorus platycercus, ii. 65 ; on 
Pipra deliciosa, ii. 66 ; on Chasmo- 
rhynchus, ii. 79. 
Samoa Islands, beardlessness of the 
natives of, ii. 322, 349. 
Sand-skipper, i. 334. 
Sandwich Islands, variation in the 
skulls of the natives of the, i. 108 ; 
