464 



Index 



MENTO - MECKELIAN, men'tomeke'- 

 lian (L. mentum, chin + Meckel) ... 7^ 



A cartilage bone present in a few 

 lower vertebrates at either side of 

 the union of the two halves of the 

 lower jaw. 



MENTUM, definition of 336 



MERIDOGASTRES 424 



An order of Lipoctena. 



MERISTEM, definition of 229 



MEROPODITE, merop'odit' (G. meros, 

 thigh + pons, foot ) 315 



MEROSTOMATA, merostom'mata (G. 

 meros, thigh + stoma, mouth) .424, 432 

 A class of Arthropoda. 



MEROZOITES, merdzo'its (G. meros 



+ zoon ) 153 



Definition of 133 



MESENCHYME, mess'enkime (G. 

 mesos, middle; enchyma, in a fluid. .248 

 Definition of 260 



MESENTERIES IN HYDRA— 



Definition of 257 



MESENTERON 321 



MESENTERY, mes'entarey (G. mesos, 

 middle; enteron, gut) 47, 49 



MESOBLASTIC BANDS, mesSblas'tik 

 (G. mesos + blastos, bud), defini- 

 tion of 280 



MESODERM, mes'oderm (G. mesos, 

 middle + derma, skin ) , definition 

 of 107 



MESOGLEA, mes'oglea (G. mesos + 

 gloia, glue ) , definition of 248 



MESOGONIMUS HETEROPHYES.. . .294 



MESOSTERKUM, mes'oster'num ( G. 

 mesos + L- sternum, breast bone) . . 



HESOZOA (G. mesos + zoe, life) 307 



Three families of parasites of un- 

 certain position. 



MESOZOIC, mes'ozo'ik (G. mesos + 



zoe) 395 



The middle or secondary group of 

 rock-systems. 



METABOLISM, metab'olizm (G. 

 metabole, change) 95 



METACARPAL, met'akar'pal (G. meta, 

 after; karpos, wrist) ,-■ 76 



METAGENESIS, definition of 255 



METAGONIMUS YOKOGAWAI 302 



METAMERE, met'amere (G. meta, 

 after; meros, part), definition of... 265 



METAMORPHOSIS, met'amor'fosis (G. 

 meta, beyond + morphe, form ) , 



definition of 331 



Of bee 364 



METAPHASE, met'afaz (G. meta + 



phainein, to appear) 57 



Definition of 98 



METAPLASM (G. meta + plasm, 

 something moulded), definition of... 91 



METATHERIA, metathe'ria (G. meta, 



beyond + therion, a wild beast) . . . .434 

 METATHORAX (G. meta + thorax, 



chest) 336 



Posterior segment of the thorax of 



insects. 

 MET ATROPHIC, met'atrofik (G. 



meta + trophe, nourishment) 192 



METAZOA, metazo'a (G. meta + zoon) . . 



Many-celled animals. Definition of. 96 

 METRATERM, me'traterm (G. metra, 



uterus + L. terminus, end) 297 



MIASTORCA, mias'torka ( G. miastor, 



a guilty wretch, also avenger) 3^6 



MICROCENTRUM RETINERVE 353 



MICRODRILI ...,.423 



An order of Oligochaeta. 

 MICROFILARIA— 



Diurna 304 



Nocturna 30\ 



MICROGAMETES, ml'kroga'metz (G. 



mikros, small + gametes, spouse).. 131 

 MICROMERES, mi'kromers (G. mikros, 



-f- meros, part) 280 



A cell of the upper pole in mero- 



blastic eggs. 

 MICRON, mi'kron (G. mikros, small). 



One thousandth part of a millimeter. 191 



Definition of 239 



MICROPYLE, ml'kropil (G. mikros + 



pyle, gate) , definition of 105 



MICROSPORES (pollen) 244 



MICROSPOROPHYTES (G. mikros + 



sporos, seed + phyta, plant), defini- 

 tion of 239 



MICROTOME 39 



MICRURA LEIDY 308 



MID-BRAIN 66 



MIGRATIONS, migra'shtinz (L. 



migrare, to transfer), of plants and 



animals 39 j 



MIGRATORY CELLS, amoeboid cells 



of the blood 248 



MIGULA 191 



MILNE-EDWARDS 381 



MINCHIN'S CLASSIFICATION 152 



MIND, definition of 175 



MIND AND MATTER 175 



MIRACIDIA, mir'asid'ia (G. dim. of 



meirakion, a stripling), definition 



of 290 



MIRIENTOMATA 425, 433 



MITE, ITCH 351 



MITOCHONDRIA, mitokon'dria ( G. 



mdtos, thread + ohondros, grain), 



definition of 91 



MITOSIS, mito'sis (G. mitos, a 



thread) , definition of 99 



Meaning of 99 



MODERN LANGUAGES 41 



MOLDS, in paleontology, definition of. 399 



