INDEX. 



Balbiani on salivary cell?, 267 



on sexual rudiments, 248, 690 



Ealfour on antennas, 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 



Barrels on embryology of Nemertids, 



24, 75 



Basal ganglia. See Central ganglia. 

 Basement membrane, 37, 282 

 Basilar membrane of compound eye, 



SIS- 532 



development of, 552 

 Bee. See Apis. 

 Bellesme. See 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, antennae functions of, 593 



brain of, 1 12, 448 



bursa of, 724 



ccelom, development of, 255 



compound eye, development 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 



supraojsophageal 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 



tracheae 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 

 Brachycerae, 29, 30 

 Brain, 450 



an automatic centre, 228 



calices of, 461 



comparison with vertebrate 

 brain, 450, 495 



cortex of, 460 



crossed relations of, 476 



development of, in embryo, 441, 



4^3 



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 

 tracheae of, 365 

 Brandt, A., egg-cell of, 701 



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 



49 



