INDEX 



957 



Muscular system of Amphioxu<;, 517. 



of Auodonta, 449. 



of Arenicola, 258, 



of Ascidian, 501. 



of Aurelia, 185. 



of Balanoglossus, 490. 



-of Birds, 737. 



-of cockroach, 373. 



of crayfish, 325. 



of dogfish, 610. 



of earthworm, 248. 



-of frog, 660. 



of haddock, 617. 



of Helix, 438. 



of Hirudo, 273. 



of Insects, 388. 



^ of Myxine, 575. 



— — of Peripatus, 362. 



of Petromyzon, 581. 



of pigeon, 737. 



of rabbit, 786. 



of Sepia, 457. 



of skate, 590. 



of starfish, 293. 



— tissue, 49. 



— tonus, 449. 

 Musk deer, 850, 852. 



— glands, 852. 

 Mussel, 8, 479. 



— fresh-water, 446, 447. 

 Mustela, 873. 

 Mustelus, 628, 634, 719. 

 Mya, 480. 



Mycetes, 885, 



Mycetozoa, 130. 



Myelencephalon, 542. 



Mygale, 419, 420, 422. 



Mygalomorpha, 422. 



Myocoel, 521. 



Myocommas, 517. 



Myodes, 867. 



Myogale, 874. 



Myomeres or Myotomes, 517, 618. 



Myomorpha, 867. 



Myopsida, 486. 



Myotomes, 517, 618. 



Myriacanthus, 635. 



Myrianida, 268. 



Myriopoda, 9, 367. 



Myxmecobius, 840. 



Myrmecophaga, 844. 



Myrmecophagidae, 844. 



Myrmecophilous plants, 403. 



Mysidacea, 350, 353. 



Mysis, 350, 353, 358. 



— compound eye of, 326, 327. 

 Mystacoceti, 864. 



Mytilus, 480. 



Myxine, 6, 551, 565, 574. 



— and Petromyzon contrasted, 584. 



— respiratory system of, 577, 577. 



— section through anterior region of, 576. 

 Myxospongida, 164. 



Myxosporidia, 135. 

 Myzostoma, 575. 

 Myzostomata. 244, 270. 



Nagana, parasite of, 147, 410. 



Nais, 266. 



Naja, 709. 



Narcomedusa?, 204. 



Narwhal, 864. 



Nasal capsule, 533. 



Nasalis, 885. 



Natural selection, 912. 



Nauplius, 358. 



Nautilus, 8, 9, 468, 482, 483, 484, 487, 488. 



— shell, 483. 

 Navel, 822. 

 Nearctic region, 905. 

 Nebalia, 282, 349, 350, 353- 

 Nebendarm, 266. 

 Necator, 242. 

 Nectonema, 243. 

 Necturus, 559, 680. 

 Nekton, 895. 

 Nematocysts, 172. 

 Nematoda, 236. 



Nematode, male, diagram of, 238. 

 Nematohelminthes, 236. 

 Nematomorpha, 236, 243. 

 Nemertea or Nemer tines, 11, 231. 

 Nemertine, longitudinal section of, 231. 



— transverse section of, 232, 233. 

 Nemer tines, classification of, 235. 



— general account of, 232. 

 — ■ habits of, 235. 



— relationships of, 234. 

 Neomenia, 478. 

 Neomylodon, 844. 

 Neornithes, 770. 

 Neotropical region, 905. 

 Nephelis, 279. 

 Nephila, 418. 

 Nephridia of crayfish, 332. 



— of earthworm, 251. 



— of leech, 277. 



— of mussel, 453. 



— of Peripatus, 364. 



— of Vertebrates, 568. 

 Nephridioblast, 256. 

 Nephrops. 320, 332, 353. 

 Nephrostome of kidnej', 566. 

 Nephthys, 268. 



Nereis, 266, 267, 268 



Nerve cells, 26, 28, 50. 



cord, dorsal, of Balanoglossus, 497. 



— fatigue, 29. 



— fibres, 50, 51. 



— — transmission along, 28. 



— stimuli, kinds of, 28. 



— tissue, 50, 51. 

 Nerves, cranial, 545. 



Nervous activities in Animals 26. 

 Nervous system of Amphioxus, 518. 



of Anodonta, 450. 



of Arenicola, 258. 



of Ascidian, 503, 



of Aurelia, 185. 



of Balanoglossus, 490. 



of bee, 379, 380. 



of Cephalopoda, 482. 



of Chaetognatha, 280. 



