GENERAL INDEX 519 



Amphioxus, 33, 407 



„ atrial cavity, 409 



,, branchial nephric glands, 426 



endostyle, 198, 212 

 ,, excretory organs, 389, 395, 477 



„ neuropore, 220, 457 



notochord, 435, 436, 443 

 „ pleural folds, 495 



,, septa between myomeres, 416 



,, somatic muscles, 409 



yolk, 485 

 Androctonus, 53, 54, 372, 423 

 Annelids, lateral sense-organs, 357, 367 

 ,, nephric organs, 390 

 „ origin of Arthropods from, 395 

 ,, parapodal ganglia, 283 

 ,, phagocytic glands, 421 

 Anthozoa, 474 

 Antiarcha, 29, 326, 343 

 Antibody, 492 

 Antitoxin, 492 

 Anus, 43, 457 

 Aponeuroses, 327, 342, 414 

 Apparatus, auditory, 355 

 ,, dioptric, 83 



,, respiratory, 148 



,, suctorial, of Petromyzon, 287 

 Appendages, branchial, of Ammoccetes, 161, 162, 163, 164 

 ,, ,, Limulus, 164 



,, ,, internal, 149 



,, derivation of suctorial apparatus of Petromyzon from, 290 



disappearance of, in transformation of Arthropod into Vertebrate, 386, 

 413 

 „ evidence of, in prosomatic region of ancient fishes, 342 



,, muscles, in Limulus and Scorpion, 247 



,, prosomatic, of Gigantostraca, 234 



Trilobites, 351 

 Apus, 28, 137, 436, 437 

 Arachnids, eyes, 75, 87 



,, diverticula of stomach, 109 



,, lyriform organs, 364, 368 



,, segmental excretory organs, 423 



Archreocytes, 473 

 Artemia, 0. Branchipus 

 Arthropleura, 249 



Arthropoda, arrangement of organs, 10 

 ,, evolution, 11 



., excretory organs, 396, 418 



eyes, 75, 89 

 giant-fibres, 489 

 ,, musculature, 411 



,, olfactory organs, 220 



