6oo 



INDEX 



L. 



^abial palp, see Palp 



Labrum, 356 



Lachrymal ducts and glands, see 

 Naso-lachrymal ducts and glands 



Lacunae, see Bone 



Lamellae oF gills (Mussel), 388 



Lamellibranchiata, 396 



Lamina terminalis, 514 



Lancelet : general characters, 

 404 ; fins, 405 ; skeleton, 405 ; 

 gill-slits and bars, 407 i enteric 

 canal, 408 ; blood-vessels, 408 ; 

 nephridia, 408 ; nervous system, 

 408 ; gonads, 409 ; development, 

 4°9. 557 ; practical directions, 



, 410-413 



Larva, 9, 340, 370, 395, 396, 409 



Laryngo-tracheal chamber, 141 



Larynx, 489, 500 



Lateral line, 416, 448 



Legs, see Appendages 



Lens of eye, 183, 517, 569 



Lepus, see Rabbit 



Leucocyte, 105, 328 



Life, origin of, 281 ; and see Bio- 

 genesis 



Life-history, 8, 206 ; and see under 

 various types 



Ligaments, 55, 57 



Limbs, see Appendages 



Lips, 468 



Liver, 20, 133, 204, 359, 408, 431, 



499 

 Lobster, 346 

 Lumbricidse, 341 

 LuMBRicus, see Earthworm , 

 Lungs, 10, 22, 141, 204, 208, SOI 

 Lymnseus, s^S 

 Lymph, 18 

 Lymph-hearts, 97, 91? 

 Lymphatic glands, see Adenoids 

 Lymphatic system, 18, 97, 442 



M. 



M 



^ alleus, see Auditory ossicles 

 Malpighian capsule, 146, 574 

 Mammalia, 219, 403, 466 



Mammary glands, see Glands 



Mandible, 16, 44, 352, 422,-479 



Mantle, 381 



Mantle-cavity, 385 



Manubrium : of Medusa, 307 ; of 



malleus, 519; of sternum, 483 

 Manus, 5, 50, 468, 485 

 Marrow-cavity, 48 

 Matrix, see Intercellular substance 

 Maturation of ovum, 552 

 Maxilla : Cra;yfi3h, 352 

 Maxilliped, 350 

 Meckel's cartilage, 44, 422 

 Mediastinum, 501 

 Medulla oblongata, 157, 443, 513 

 Medullary : cord, folds, groove, and 



plate, 202, 559 ; sheath, 167 ; 



substance of Infusoria, 264, 269, 



273 

 Medusa, 304, 307-312 

 Megagamete, 279 

 Meganucleus, 265, 273 

 Megazooid, 251, 279, 

 Membranous labyrinth, 186, 449, 



Mesencephalon, see Mid-brain 



Mesenteron, see Archenteron 



Mesentery, 22, 431, 498 



Mesoderm, 202, 203, 210, 340, 369, 

 454. 559. 565; vertebral and 

 lateral plates of, 565 



Mesodermal segments, 565 



Mesoglcea, 293, 307 



Mesonephros, 573, 574 



Metabolism, 149, 236 



Metacarpus, 50, 485 



Metamere, Metameric segmenta- 

 tion, 319, 346, 354 



Metamorphosis, II, 209, 280 



Metanephros, 573, 576 



Metapleural fold, 406 



Metatarsus, 51, 488 



Metazoa, 286 



Microgamete, 279 



Micrometer, 121 



Micromillimetre {fi) = T-i?ir* °f * 

 millimetre, or ^Jtrsr of an inch 



Micronucleus, 265, 275 



Micropyle, 400, 547, 554 



Microtome, ijS 



