372 



INDEX 



Jenkinson, 318 

 Jennings, 209 . 

 Jordan, 106 

 Julus, attraction cone, 168 



Karyogamy, 190, 192, ff. 



karyokinesis, 44, ff, 



karyolymph, 37 



karyoplasm, 37 



karyosomes, 38 



kern-plasma relation, 77; during 



cleavage, 222 

 kinoplasm, 39 

 Klossia, syngamy, 197 

 Korschelt and Heider, 152 

 Kupelwieser, 172, 303 



Lacerta, genital ridge, 111 



Lankester, 264 



Lepas, movement of spindle, 230 



Lepidoptera, digametic females, 314 



Lepidosiren, chromosomes, 68; mat- 

 uration, 134, 136 



leptonema, 133 



Leptoplana, blastomeres, 256 



Leptynia, X-chromosome, 312 



Leudscus, spermatozoon, 99 



Leuckart, 107 



Ley dig, 31 



Lilium, spireme in spore-mother- 

 cell, 53 



Lillie, F. R., 168, 183, 245, 275, 278, 

 279 



Lillie, R. S., 80 



Limax, polar bodies, 148 



Limnadia, parthenogenesis, 203 



linin, 37 



lithium, effects upon development of 

 Fundulus, 318, 319 



Litomastix, multiple embryo for- 

 mation, 315 



localization, development of, 286; 

 germinal, 264, 288; regulation of, 

 284, 286 



Locusta, spermatophore, 105 



Loeb, 171, 172, 205, 206, 210, 301 



Loeb and Moore (read, Loeb, King 

 and Moore), 305 



Loligo, cleavage (bilateral), 237, 241; 

 spermatophores, 106 



Loricera, spermatophore, 105 



Lott, 166 



Lyon, 269 



McClendon, 269 

 McClung, 135, 310, 313 

 Maas, 280 

 macrogamete, 10 

 macronucleus, 58 



magnesium, effects of upon differ- 

 entiation, 318, 319 



malic acid, effects of upon motion of 

 spermatozooids, 167 



Malpighi, 22 



Mammalia, ova, 87 



mantle fibers, 52, 79 



Mark, 148, 266 



Marshall, 103 



Mastigella, chromosome number, 66 



maternal characters, in hybrids, 

 301, ff.; affected by external con- 

 ditions, 304, ff. 



maturation, 131, ff.; induced ("arti- 

 ficial"), 205; in oogenesis, 142, 

 ff.; in parthenogenesis, 158, ff.; 

 in plants, place in life history, 161 ; 

 in Protozoa, 156, ff.; in spermato- 

 genesis, 133, ff.; period, of op- and 

 spermatocyte, 113; place in life 

 history, 160, ff.; reducing divisions 

 in, 152; relation to heredity, 152; 

 results of, 151, ff.; stimuli leading 

 to, 150; time relation to fertiliza- 

 tion, 179, ff., 180 



Maupas, 209, 210 



megagamete, 197 



meiotic (maiotic) division, 133 



membrane, chorionic, 96; formation 

 by fertilized ovum, 175; nutritive, 

 protective, etc., 97; of ova, 95, ff.; 

 tertiary, 97; vitelline, 95 



Mendelian heredity, relation of 

 chromosome structure, 294, 295 



Menidia. chromosomes in hybrids, 

 75, 223 



Mermiria, X-chromosome, 312 



merocytes, 171 



merogony, 204 



mesoblast, 336 



mesoderm, 336; axial and gastral, 

 338, 339 



mesophase, 52 



mesoplasm, 267 



Mesostomum, cleavage (irregular) , 

 239 



metamorphosis, of spermatid, 114, 

 125, ff., 126 



metaphase, 52 



metaplasm, 40 



Metapodius, idiochromosome, 311 



Metcalf, 62 



microgamete, 11, 198 



Micrometrus, primitive germ cells in 

 embryo, 112 



micronucleus, 58 



micropylar cell, 96, 120 



micropyle, 96 



microsomes, 35 



Microstomum, fission, 5 



middle piece, of spermatozoon, 98 



Minot, 210 



