GLOSSAKY OF TECHNICAL TERMS xxix 



METAPODIALS (Gr. /uera, next after ; TTOVS, foot), a collective term 



for metacarpals and metatarsals. 

 METATAKSALS (Gr. juera, next after ; Tapaos, foot [ankle] ), the 



bones of the instep. 



MICROGAMETES (Gr. fjiLKpos, small ; ya/xerrys, spouse), the small 

 (male) gametes, where the latter are differentiated into two 

 sizes. 



MICROLECITHAL (Gr. fjuKpos, small ; \tKiOos, yolk), a term applied 

 to eggs with little yolk. 



MICRONUCLEUS (Gr. fJUKpos, small ; Lat. nucleus, kernel), the smaller 

 (germ) nucleus in Paramoecium, &c. 



MICROPYLE (Gr. piKpos, small ; uvAr;, gate), a small opening in 

 the integuments of an ovule, through which the pollen tube 

 usually enters. 



MICROSPORANGIUM (Gr. /UK/JO'S, small ; sporangium), a small sporan- 

 gium, in cases where the latter are differentiated into two sizes. 



MICROSPORE (Gr. nLKpos, small ; o-Tropo?, seed), a small spore, in 

 cases where large and small are produced. 



MICROZOOID (Gr. juKpo's, small ; fwcw, a living thing ; eTSos, form), 

 a small individual, in unicellular organisms in which two 

 sizes occur. 



MIOCENE (Gr. /ueiW, less ; Kau/o'j, recent), one of the subdivisions 

 of the cainozoic era of the earth's history. 



MITOSIS (Gr. /uu'ros, thread), the changes undergone by the nucleus 

 in typical cases of nuclear division, in which various thread- 

 like structures appear. 



MNEMIC (Gr. mw, memory), a term applied to a theory which 

 attributes the phenomena of heredity to a kind of memory. 



MONADS (Gr. /uorck, unit), minute unicellular organisms of the 

 group Flagellata. 



MONOECIOUS (Gr. /xoVos, single ; OLKLOV, dwelling place), having the 

 male and female sexual organs in one and the same 

 individual ; hermaphrodite. 



MONOHYBRIDISM (Gr. jxo'vo?, single ; Lat. hybrida, hybrid), a 

 Mendelian term for a cross between organisms which differ 

 as regards one pair of contrasted characters. 



MONOPODIAL (Gr. jmoVos, single ; -nous, foot), a type of branch- 

 ing in which the main axis is continued after each branch is 

 given off. 



MONOSOME (Gr. judges, single ; o-w/ia, body), the unpaired chromo- 

 some which appears in the nuclei of certain cells. 



