280 



INDEX 



Saw-flies, 81, 131, 134, 135 

 SCHAUDINN, F., 14 



SCHAXEL, J. ( 107 

 SCHLEIP, W., 128, 167 



SCHREINF.R, A. and K. E., 69 

 Segmentation, 39-41, 56, 117- 



124, 248 

 SEILER, J., 169 

 Sertoli cells, 103, 186 

 Sex, 151, 152171, 229-238 

 SILVESTRI, F., 83, 133, 180 

 Simultaneity of division, 122 

 Spermateleosis, 95 

 Spermatid, 62, 93-103 

 Spermatocyte, 62, 63, 94, 96 

 Spermatogenesis, 60-73, 90-103 



of Hymenoptera, 134 

 Spermatogonla, 60, 63 

 Spermatozoon, structure of, 91, 



92 



entrance into egg, 111-114 

 Spermiogenesis, 95 

 Sphaerechinns, 208-211 

 Spiders, 159 

 Spindle, mitotic, 30, 42 

 Spindle-bridge, Spindelrestkor- 



per, 50, 95 note 

 Spireme, 68 

 Spirophase, 198 

 Stains, n, 12, 20 

 Starfish, 129, 130, 147 

 STEVENS, N. M., 159, 163, 176 

 Stick Insects, 131, 135 

 STOUT, A. B., 195 

 Strepsinema, strepsitene, 67 

 Strongylocentrotus , 208 

 Structure of protoplasm, 7-11 

 STURTEVANT, A. H., 224 note 

 Styela, 247-249, 251 

 Stylopidae, 129 



Supernumerary chromosomes, 1 60 

 Surface tension, 41, 56, 112, 121 

 SUTTON, W. S., 214, 257 

 Synapsis, 56 note, 64, 68 

 Syndesis, 68 

 Synizesis, 56 note, 64, 68, 75, 127, 



128 



TAHARA, M., 153 

 TANAKA, Y., 228 



TEICHMANN, E., 56 



Telolecithal eggs, 118 



Telophase, 33 



Telosyndesis, telosynapsis, 08 



Tenthredinidae, 81, 131, 134, 135 



Tetrads, 72 



Tetraploid chromosomes, 193, 212 



Tetraster, 57, 123, 202 



Thelykaryotic larvae, 209 



Thelytokous parthenogenesis, 135 



THOMPSON, D'A. W., 54 note 



Thrips, 131 



Thyanta, 160 



Thysanoptera, 131 



TISCHLER, G., 193 



TOWNSEND, C. O., 13 



Trematoda, 159 



Triaster, Tripolar spindle, 57, 123 

 Trichogramma, 187 

 Tunicata, segmentation, 247- 

 249, 251 



Verson's cell, 104 

 Vitelline membrane, 105, 109, 

 112 



WALKER, C. E., 241 

 Wasp, 132, 134, 153 

 WEISMANN, A., 172, 173, 206, 



245. 257 

 WILSON, E. B., 10, 69, 157, 160, 



192, 196, 199, 246, 249, 257 

 WINGE, O., 193, 221 note 

 WINIWARTER, H. VON (DE), 67, 



231 note 



WOLTERECK, R., 128 



X-chromosome, 155-168, 230 



2 34 

 Xenos, 129, 138 



Y-chromosome, 157, 230-234 

 Yolk, 76, 106, 108 



lobe, 249 



nucleus, 106, 108 



ZARNIK, B., 168 

 Zygonema, zygotene, 67 

 Zygotene threads, origin of, 69- 



CAMBRIDGE : PRINTED BY J. B. PEACE, M.A., AT THE UNIVERSITY PRESS 



