INDEX TO VOLUME FOUR. 
DE sense i rad , 690. 
Acalypha Virginica, 355 
Acceleration, theory of, ‘932. 
Accipiter, 711. 
Acer, 2h 
Achorion e eg 343. 
Acidalia, 229 
Acidaspis Whitfleldi, i 568. 
Acontia metallica, 
Vtde Luna, pr toe 52. 
Agaricus muscarius, 344. 
Alaria — EN 295. 
Alaska, 
‘Albino edu: 58. 
Albino snow bird, 376. 
Albino barn swallow, 121. 
Tbino woodchuck, 252. 
a, 58. 
CI 
Amphiroa, 288. 
Anas boschas, 49. 
Anas obscura, 49. 
Andes, 358. 
Andi 
igena, 712. 
Androgynous inflorescence, 46, 355. 
Anemones, sea, two-mouthed, 256. 
An a, 391 
Anomis xylina, 52. 
Anser, Tos 
Ant lion 
Apelte dae Oe 
s, 115. 
Aphrodederus, Sayanus, 105, 107, 719. 
A 
em rx ec a. 
Arcella. 379. 
cath gp Masc", 319. 
Arch 
aote rl 
Arctomys monax, 252. 
Areas of prese ogg. 4. 
Arion fuscus, 170 
pm! Korn "d the South, 52. 
pvo xc em 
‘Asteroceras, 233. 
AEN: ‘479. 
k, great, 57. 
Bas 
Bathybius, 50 
reap a, skull of, 505. 
x 
Beaver, extin ct, 504. 
Bees, A tilization of ag by, 689. 
Belone lon ngi rostris, 
Bernicia; i 
idens ue santhemo des. 352. 
Bidens fr rmt p 
Bik ia, 313, m^ 
ill 
Binocular microscope, 573, 633, 695. 
Birds, classification of, 746. 
Birds of Alaska, 
irds of 37 365. 
lackbird, 52 
Blood, hum man, 704. 
Bluefish, 519. 
Boleosoma Olmstedii, 113. 
Bone caves o Lo altar, 255. 
Cito ai, ot 
Borers, 
“hanes , geology of, 238. 
Brachiopoda, 510. 
hiopoda, position of, 314. 
aape a a 713. 
Brazil, carboniferous fossils of, 694. 
azil, i en of, 128. 
rustacea, 435. 
Bryo pais, 
Bryttus epia APE 102, 106. 
Garbontiecaas fossils, 190. 
Custodes Oben S of Brazil, 694. 
Catarrac 
Ca: 
me ag 
(769) 
