i Agassiz, 
INDEX TO VOLUME XX. 
Abies se, 643. 
gra 
a, 643 
a; placenta Sh 167. 
Apna S nlect, 
nodon, 29 
Nea a A 280. 
Achorutes 
Acronycta, darkening of the hairs of before pu- 
pation 
Afi 265. 8, 798 8, 880. 
frica E 717, 71 j 87 
Louis, life S aa i 
Agelen na nevia, orelor eak of, 666. 
Agnatha, 103r. 
Agricultural experiments, botanical value of, 65. 
Ajax butterfly, migrations of, 970. 
Akh lash ruins 
aks Į y ir 
Pre ser 60. 
Aldrich, C., a curious superstition, 744. 
instance Sor nage a9 variation, 807, 
vision of bir 
Alligator erate 289, — an 
ssissippiensis, 2 291; 
‘Allen; rerai = the tarsus of bats, x 
> types “A tooth sree 
a 
abd, the r 
Alps, glaciers in, 881. 
aran seg 3 bee poe Ss 
aa rica, 6 
878. 
Amæbæ, td il i by — in, 753. 
ctatum 
_ Ambly: peapa prio 
Americ. 
ds Ornithologist Walon, 209. 
Philos gage airia 203. 
Amnion, origin of th 
yriapi ia 
Andesite, definition of, 160. 
Animal forms, development of, 152. 
: naiona, wig cal distribution of pelagic ma- 
Aiast, tale, 75 
P Ee ae am Society of Washington, 195. 
porera wai T031. 
peel nests rai er I » 679. 
twerp, zoologi gare lens of, goo, 
Toe maritima, og evelopment of, 299. 
hodius erraticus 
eos aeree ad 6or. 
Appatnthien Mountain Club, 210, 320, 420, 582. 
a — , 876. 
Archzological i aids, gto. 
ogy, American, -= points in, 192. 
are T Yaa 
embryology of 
i orga f ell i 889, 73- 
se smi In, 29 
ioe brs 
p 62 noe oof: Ae > 877. 
hypus, 172. 
“Allison, 6 AEE e 584. 
PRA aot poas, 287. 
enia, 612 
areca aurita, unusual abundance of, 816, 
s 63>. 
‘radilina , 287. 
Alps, gla aciation in, 968; 
, medicine men, 1067. 
Bacterium, new species, 68. 
Ballostoma year 
. H. ager pes rock explosion, 137. 
altimore ori ole, 
Batekes, 7 
Bat rt RE areeni 76. 
Bathyurus, 156. 
Bathyopsis, = m 
Bats, tarsus 175. 
Baur, G., the’ intercentrum of living Reptilia, 
the! oldest tarsus (Archegosaurus), 
a = atlas and 
reat Codi se axis of the 
the ribs = Sphenodon, 
Beal, F. E. L., some notes on 
i, 
twigs — by telephone wires, 
Beal, W. J., J ! F 
hat Sag He bog ee apples be distin. 
Bear, 
former so Pe ral limit of pe 655. 
Bee, ogy oe in the e hu mble, 669. 
eae 
Beetle 
may tnt gas -boriag, 754. 
T = eological survey of, 57. 
Belted kingfisher, 28. og 
Bennett ., internal s A cag formation in dia- 
9 
bine t migrations, 
symbiosis between a she er 
roots of flow 
12! 
"s Vegetable Physiology, 
the kest of the ash tree , 806, 
Biological Society of Washi ington, 209, 412, 580, 
Biotite, 754. 
Birds, 66r, 738. 
of a 
of Sulu islands, 178. 
led by « 1, sei owers, gêr. x 
male, ae foe yri or their eggs and young, 903. 
I 
of spas, Moluccas and Shoa, 8er. 
vision mot, 6 
__ wings o} 
Bison, 177. 
See a bunting, -= 
Blind, dreams of, - zee, Gr. 
Blowtube in the U. S., 198. 
-bird, 28. 
jay, 27. 
saree : 
im in rorm of, 753. 
Borneo, 106. ~ 
Bornia transitionis, 803. 
