GENERAL INDEX 



[The numbers in dark type refer to illustrations] 



Acilius larva, eye of, 78, 83 

 Acromegaly, 425 

 Actinotrocha, 438 

 Addison's disease, 423 

 Adelopthalmus, 249 

 Adrenalin, 423, 491 

 Adrenals, 423, 491 

 Agnathostornatous fishes, 29, 343 

 Alimentary canal, 433 



„ ,, Ammoccetes, 168, 405, 445 



,, ,, invertebrate, compared to tube of central nervous system of verte- 



brate, 43, 433 

 ,, ,, innervation of, 447 



origin of, 444 

 ,, ,, position of vertebrate and invertebrate, 10 



,, ,, possibility of formation of new, 58 



,, ,, relationship between notochord and, 434 



Ammoccetes, 32, 245 



,, an ancestral type, 35, 309 



,, alimentary canal, 168, 405, 445 



,, auditory organ, 378, 379 



brain, 39, 40, 41, 45, 46, 48, 54, 61 

 „ branchial appendages, 161, 162, 163, 164 



basket-work, 126, 128, 296, 331, 335 

 chamber, 161, 168, 162, 163 

 ,, ,, circulation in Limulus and, 174 



,, ,, diaphragms, 161, 167 



„ ,, lamellae, 175 



,, ,, muscles, 171 



,, ,, nerves, 164 



segments, 178, 312 

 cartilage, hard, 133, 133, 293, 294, 377 



muco, 130, 131, 291, 293, 294, 296, 330, 331, 333, 334, 



335, 338 

 soft, 129, 130, 293, 294, 296, 335 

 ,, degeneracy, evidence of, 59, 94, 343 



,, development, 228, 458 



,, digestion, 58, 442 



,, epithelial cells of gills, 214 



