344 INDEX OF 
Kinetochromidia, 214. 
Kinoplasm, 214. 
Lamprey, 100, 209. 
Larva, 23. 
Lecithin, 8, 12. 
Lepas, 172, 225. 
Lepidoptera, 118. 
Lepidosteus, 32, 33, 101. 
Leptinotarsa, 37-41, 111, 125-129, 
138-139. 
Leptotene, 251, 252. 
Life cycles, 22 ff. 
Linin, 5, 7. 
Linked characters, 307. 
Locust, 23. 
Lophius, 102. 
Lygeus, 259. 
Lymnea, 192. 
Macrogamete, 27. 
Male, 18. 
Man, chromosomes of, 272 f.; 
hermaphroditism in, 194. 
Maturation, 41-47, 129, 256 ff. 
Medusa, 23. 
Mesostoma, 204. 
Metabolism, and sex, 275; and 
Keimbahn-determinants, 228. 
Metagenesis, 23. 
Metanucleolus, 183, 215. 
Metaplasm, 5, 7, 8. 
Metaphase, 15, 16. 
Metazoa, 1, 18. 
Miastor, 51-68, 107, 217 ff., 235, 
293-294. 
Microgamete, 27. 
Microsome, 6. 
Middle piece, of sperm, 21, 216. 
Migration, of germ cells, 31-34, 
101-102, 116, 226. 
Mitochondria, 5, 13, 39, 40, 226 ff., 
275-289; methods, 282-283; 
Ascaris, 284; chick, 278; divi- 
sion of, 281, 284; function of, 
SUBJECTS 
286 ff.; in living cells, 280, 281; 
in plants, 277, 280; reduction of, 
285; and sex, 285. 
Mitosis, 13, 14-16. 
Mitrocoma, 183. 
Mixochromosomes, 251. 
Moina, 163. 
Mollusk, 185, 191. 
Monad, chromosome, 45, 46. 
Moniezia, 136, 297. 
Moneecious, 18, 191. 
Monospermy, 48. 
Mosaic development, 233. 
Moulting, 23. 
Musca, 107. 
Myofibril, 280. 
Myzine, 209. 
Myzostoma, 37, 185, 193. 
Nahrzellenkern, 170. 
Nebenkern, 203, 221, 285. 
Nebennucleolus, 214. 
Nematodes, chromosomes of, 267 ff. 
Nepa, 137. 
Neratina, 186, 225. 
Netzapparat, 103, 104. 
Neurofibril, 280. 
Nuclear sap, 6. 
Nucleic acid, 11. 
Nuclein, 11. 
Nucleolo of Silvestri, 145 ff. 
Nucleolus, 5, 6, 13, 167, 213 ff. 
Nucleoprotein, 8, 11. 
Nucleus, 3, 13-16. 
Nurse cells, 35-36, 53, 119-121, 150, 
151, 201, 202. 
Nutritive substances, 225 ff. 
Cnothera, 160. 
Oncopeltus, 261, 262. 
Odcyte, 38, 39, 40-41. 
Odbgenesis, 42, 256 ff. 
Oébpthora, 145, 146. 
Ophryotrocha, 37. 
Opossum, 288. 
