GENERAL INDEX 



531 



Organs, auditory, of arachnids and Insects, 368 

 branchial, innervation of vertebrate, 151 



,, sense-organs of embryo vertebrate, 261, 281 



chordotonal, of insects, 364, 369, 370 

 electric, 470 

 generative, of Limulus, 208, 209 



,, connection between Thyroid gland and, 215 



genital, of sea-scorpions, 206 

 lateral line, 355, 411 

 lyriform, of arachnids, 364, 369 

 olfactory, of Scorpion group, 220 

 phagocytic, 420 

 racquet, of Galeodes, 369, 375 

 segmental excretory, 389, 391, 408, 418, 459, 477 

 sense, of appendages of Limulus, 358 

 vestigial, 456 

 of vision, evidence of, 68 

 vital, 57 

 Origin of alimentary canal, 444 



arthropods from annelids, 395 



atrial cavity, 409 



auditory capsules and parachordals, 377 



coelom, 475, 481 



ductless glands, 428 



free cells, 472 



heart of vertebrate, 179 



lateral line organs, 356 



muscles, 478 



musculature, branchial, 170 



,, somatic trunk, 406 



nervous system, central, 480 

 notochord, 434 



segmental excretory organs, 389 

 skeleton of vertebrates, 119 

 vertebrates, 9, 36, 351, 433, 493 

 Ostracodermata, 326, 343 

 Osteostraci, 29, 75, 275, 326, 343 

 Otoliths, 378 

 Ovum, 473 



Pacinian bodies, 470, 477 

 Palannon, 20, 422 

 Palaeontology, evidence of, 20, 497 

 Palseostoma, 317 

 Palffiostraca, 27, 396 



,, median eyes, 74 



,, mesosomatic appendages, 188 



,, olfactory organs, 221 



,, segments, compared to Ammoccetes, 30S 



Pantopoda, glands, 423 

 Parachordals, 121, 132, 377 

 Parapodia, 357 



