842 



INDEX. 



PAGE 



MyoxicUe .... 749 

 Myriopoda . . . 307-309 

 Myrmecobius . . . 723 

 Myrmecophagida; . . . 727 

 Myrmecophagus . . . 727 

 Mysis .... 284, 293 

 Mystacoceti .... 747 

 Mytilus .... 406 

 Myxine .... 496 



,, and Petromyzon con- 

 trasted .... 506 

 Myxospongida . . .130 

 Myzostomata . . . 223 



NAIS 219 



Narwhal .... 747 

 Nasal capsule . . . 459 



Nasalis 767 



Naso-buccal groove . . 522 

 ,, palatine canal . . 685 

 Natural Selection . . . 810 

 Nauplius .... 284 

 Nautilus .... 409 

 Nearctic region . . . 804 

 Nebalia .... 284 



Nebendarm .... 220 

 Nectonema .... 195 

 Necturus .... 586 

 Nekton .... 794 



Nematocysts . . . .140 

 Nematoda . . . .189 

 Nematohelminthes . .189 

 Nemertea or Nemertines 184-189 

 Nemertes . . . .189 

 Neomenia .... 404 

 Neornithes .... 662 

 Neotropical region . . 804 



Nephelis .... 232 

 Nephridia of crayfish . . 277 

 of earthworm . 204 

 of leech . . 229 

 of mussel . . 382 

 of Peripatus . . 304 

 of Vertebrates . 489 

 Nephridioblast . . . 209 

 Nephrops .... 293 

 Ni phrostoma of kidney . . 491 

 Nephthys .... 220 

 Nereis . . . 197, 219, 220 

 Nerve cells .... 43 



35 

 53 



53 

 55 



Nerve fatigue 



,, fibres . 



,, tissue . 

 Nerves, cranial 



,, origin of . 



,, structure of 

 Nervous activities in Animals 



PAGE 



26 



43 

 42 



472 



43 

 43 



Nervous system of 



Amphioxus . 

 Anodonta 

 Arenicola 

 Ascidian 

 Aurelia 

 Balanoglossus 

 bee 



Cephalopoda 

 Chretognatha 

 cockroach 

 crayfish 

 Crinoid 

 Distomum 

 earthworm . 

 frog 



haddock 

 Helix . 

 Hirudo . 

 Holothurian . 

 Hydra . 

 Insects . 

 Limulus 

 Lizards . 

 Myxine . 

 Nematoda 

 Nemerteans . 

 ,, Peripatus 

 , , Petromyzon . 

 ,, pigeon . 

 ,, rabbit . 

 , , scorpion 

 ,, sea-urchin 

 ,, Sepia . 

 ,, skate 

 ,, spider . 

 ,, starfish . 

 , , Vertebrates . 

 Nervures 

 Nests of Birds 

 Neurapophysis = Neural 

 Neurilemma . 



5 3 

 55 

 3 3 

 5 5 

 J! 

 53 

 > 5 

 53 

 53 

 53 

 5 5 

 5 3 

 33 

 3 5 

 3) 

 35 

 3 5 

 >3 

 5 5 

 35 

 5 5 

 55 

 ) 3 

 55 

 5 ) 

 55 



24, 774 



. 442 



378 



. 212 



. 428 



. 147 



. 416 



318 



409 

 . 232 



313 



. 270 



260 



. 174 



2O I 



. 568 



534 



369 

 . 226 



255 

 . 141 

 . 326 

 . 360 

 . 602 



. 498 

 190 



. 1 86 



. 304 



503 

 . 639 



. 682 



349 



252 



387 



517 



352 

 . 243 



466 



325 

 653 



spine 464 



. 43 



