INDEX. 751 
Balbiani on salivary cells, 267 
on sexual rudiments, 248, 690 
Balfour on antenna, 108 
on biramous appendages, 113 
on development of nervous 
system, 479 
on ova of insects, 710 
on relation of germ to vitellus, 
12 
Balken, 464 
Barrois on embryology of Nemertids, 
24,75 
Basal ganglia. See Central ganglia. 
Basement membrane, 37, 282 
Basilar membrane of compound eye, 
515, 532 
development of, 552 
Bee. See Apis. 
Bellesme. Sve Jousset de B. 
Bellonci on corpora fungiformia, 446 
Bellonci’s bundle, 465, 467 
Beneden, Van, on development of 
germ ova, 720 
on spermatogenesis, 720 
Biramous appendages, 113, 158 
Blanchard on peritracheal circula- 
tion, 367 
Blaps, maxilla of, 133 
Blastoderm, 13 
origin of, in Insects, 233 
relation of, to yelk, 17 
Blastoderm plasma, 683 
Blastopore, 241, 248 
Blastula stage of embryo, 231, 233 
Blatta, antennze functions of, 593 
brain of, 112, 448 
bursa of, 724 
coelom, development of, 255 
compound eye, develepment in, 
539 
cornea of, 526 
corpora fungiformia of, 462 
dorsal organ of, 254 
egg-tubes of, 669 
generative organs of, 662, 664 
hearing in, 497 
intestine of, 410 
number of abdominal segments 
in, 728 
ovary of, 669 
podical plates of, 736 
primitive trace in, 253 
salivary glands of, 404 
spermatheca of, 724 
Blatta, sutures of head in, 117 
supracesophageal nerve centres 
of, 448 
visceral nerves of, 65 
wings of, 160 
Blood, 270 
Blood corpuscles, 271 
division of, 270 
of larva, 86, 87 
Blood crystals, 272, 
Blood sinuses, 87 
thoracic, 225 
Blut-heerde, 274 
Bobretzky on development of retina, 
506, 542 
on origin of the blastoderm, 233 
Bombus, mesosternum of, 168 
trachea of abdomen in, 227 
Bombylius, mouth-organs of, 150 
Bombyx mori, development of wing 
in, 21 
Bombyx pini, sexual glands of, 685 
Bourrelet intra-ganglionnaire, 489 
Bourrelet perilaminaire, 490 
Brachia of corpus centrale, 459 
Brachycerz, 29, 30 
Brain, 450 
an automatic centre, 228 
calices of, 461 
comparison with 
brain, 450, 495 
cortex of, 460 
crossed relations of, 476 
development of, in embryo, 441, 
483 
external form of, 451 
fibrous tracts of, 463 
general morphology of, 109 
general structure of, 112, 440 
of Insects and Crustacea com- 
pared, 441 
nomenclature of Viallanes, 442 
size of, 440, 450 ; 
structure of, 112, 450 
trachez of, 365 
Brandt, A., egg-cell of, 7or 
on development of egg-tubes in 
Periplaneta, 669 
on free nuclei, 717 
on germinal vesicle, 717 
on gonads, development of, 685, 
691 
on normal hermaphrodism in 
Perla, 658 
vertebrate 
49 
