666 



INDEX. 



Mid-brain vesicle, 430. 

 Middle ear, 508. 



— plate, 356. 



Middle germ-layer, 106, 113. 



— of Amphibia, 117. 



— of Amphioxus, 110. 



— of Birds, 120. 



— of CKsetognatlia, 108. 



— of Mammals, 110, 129. 



— organs of,' 841. 

 Milk-glands, 528. 

 Milk-teeth, dentition, 309, 312. 

 Modiolus, 502. 



Morgagni's hydatid, 395. 



Morula, 56, 68. 



Mouth, development of the permanent, 



288. 

 Mulberry-sphere, 56, 68. 

 Miillerian duct, 369, 386, 395. 

 Multiple organisms, 45. 

 Muscle-layers of Amphioxus and Cy- 



clostomes, 343. 

 Muscle-plate, 174, 348. 

 Musculatxire of the extremities, 350. 



— of the head, 352. 



— voluntary, 342, 346. 

 Musculus cremaster, 392. 



— obliquus abdom. int., 392. 

 Muskelkastchen, 844, 847. 

 Myocoele, 349. 



Myomeres, 343, 350, 598. 

 Myomerism, 632. 

 Myotome, 362. 



N. 



Nail-plate, £27. 

 Nails, 526. 

 Nasal area, 511. 



— bone, 619. 



— furrow, 513. 



— orifice, inner, 514. 



— orifice, outer, 514. 



— processes, 488, 513. 

 Naso-palatal (Stenson's) duct, 517. 

 Naso-pharyngeal passage, 517. 

 Neck-measurement, 283. 

 Nephridial funnel, 356, 364. 

 Nephrostome, 864. 

 Nephrotome, 362. 



Nerves, 452. 



Nervous system, 416, 449. 



Nervus acusticus, 506. 



— cochlese, 502. 



— hypoglossus, 457. 



— laryngeus inf. (reourrens), 575. 



— lateralis vagi, 456. 



— phrenicus, 569. 



— vagus, 299. 



— vestibuli, 502. 



Neural crest, 450. 



— plate, 416. 



— ridge, 450. 



— tube, 110, 417. 

 Nictitating membrane, 487. 

 Nipple, 580. - 



Nose, 518. 



Notochord — see Chorda dorsalis* 



Nuchal flexure, 423. 



— protuberance, 424. 

 Nuclear liquid, 8. 



— loops, fission of, 53, 55, 

 — ■ network, 9. 



— ■ plate, 53. 



— spindle, 52. 

 Nuclein, 9, 26, 52. 

 Nucleoli, 9. 

 Nucleus caudatus, 442. 



— lentiformis, 442. 

 Nutritive yolk — see Yolk. 



Occipital bone, 617. 



— lobes, 448. 



— region, 608. 

 Odontoblasts, 306. 

 (Esophagus, 297, 299, 320. 

 Olfactory buds, 513. 



— labyrinth, 518. 



— lobes, 448, 511. 



— nerve, 448, 511. 



— organ, 511. 



— pit, 511. 



Omentum, greater, 299, 303. 

 — - lesser, 800, 330. 

 Ooscope, 212. 

 Optic cup, 469, 476. 



— nerve, 484. 



— vesicle, 423, 467. 



— vesicle, stalk of, 468. 

 Orbital region, 608. 



Os acetabuli, 640. 



— angulare, 622, 625. 



— articulare, 625. 



— coccygis, (600. 



— coracoideum, 638. 



— dentale, 625. 



— entoglossum, 610. 



— ethmoidale, 621. 



— froutale, 621. 



— hyoides, 613, 622., 



— intermaxillare, 622. 



— interparietale, 619. 



— ischii, 639. 



— lacrymale, 621. 



— lentiforme, 614. 



— maxillare, 516. 



— parietale, 621. 



