GENERAL INDEX 519 
Amphioxus, 33, 207 
FS atrial cavity, 409 
% branchial nephric glands, 426- 
PA endostyle, 198, 2+2- 
35 excretory organs; 477 
a neuropore, 220) ni ee 
45 notochord, 435,486,443 
yi pleural folds, 495 
= septa between myomeres, 41 
e somatic muscles, 709 
yolk, 485 
dviivontonna. 58, 54, 372, 423 
Annelids, lateral sense-organs, 357, 367 
nephric organs, 390 
$ origin of Arthropods from, 395 
iy parapodal ganglia, 283 
8 phagocytic glands, 421 
Anthozoa, 474 
Antiarcha, 29, 326, 343 
Antibody, 492 
Antitoxin, 492 
Anus, 48, 457 
Aponeuroses, 327, 342, 414 
Apparatus, auditory, 355 
i dioptric, 83 
5 respiratory, 148 
i suctorial, of Petromyzon, 287 
Appendages, branchial, of Ammoccetes, 161, 162, 163, 164 
*y a Limulus, 164 
- si internal, 149 
i derivation of suctorial apparatus of Petromyzon from, 290 
5 disappearance of, in transformation of Arthropod into Vertebrate, 386, 
413 
hs evidence of, in prosomatic region of ancient fishes, 342 
<a muscles, in Limulus and Scorpion, 247 
5 prosomatic, of Gigantostraca, 234 
Trilobites, 351 
Apus,. 28, 187, 486, 437 — 
Arachnids, eyes, 75, 87 
Pe diverticula of stomach, 109 
9 lyriform organs, 364, 368 
i segmental excretory organs, 423 
Archexocytes, 473 
Artemis, v. Branchipus 
Arthropleura, 249 
Arthropoda, arrangement of organs, 10 
a evolution, 11 
3 excretory organs, 396, 418 
a eyes, 75, 89 
i giant-fibres, 489 
‘ musculature, 411 
Ff olfactory organs, 220 
