INDEX 



477 



Volvox, proof of that a difference 

 exists between the somatic- and 

 the germ-cells, 213; as an exam- 

 ple of sexual dimorphism, 355 



Vries, Hugo de, objection to the 

 theory of ancestral germ-plasms, 

 12 ; * intracellular pangenesis ' 

 compared with Darwin's ' pan- 

 genesis,' 12; objection to the view 

 that the hereditary substance is 

 contained in the nucleus only, 

 26; on the structure of proto- 

 plasm, 38; on Haeckel's ' plas- 

 tidules,' 41 ; objection to Stras- 

 burger's and Haberlandt's views, 

 46; the * pangenes ' as bearers of 

 cell-qualities, 42; on the con- 

 tinuity of cellular organisms, 56 ; 

 on primary and accessory germ- 

 tracks, 206, 211; on the con- 

 tinuity of the germ-plasm, 207; 

 on galls as contradicting the lat- 

 ter, 218; galls of Cecidomyia poce, 

 221 ; on the crosses between two 

 species of beans, 297; on plant- 

 hybrids, 300; on dichogeny, 380, 



451 



Wagner, F. von, on gemniation 

 and fission, 145; on fission in 

 Mici'ostoma linear e, 149; on 

 gemmation, 154 



Wallace, Alfred Russel, on Papilio 

 inenino7i, 376 ; on variation, 

 410 



Ward, Lester, Neo-Darwinism and 

 Neo-Lamarckism, 408 



Weeping Ash, 444, 446 



Wiesner, Julius, on the elementary 

 structure and growth of living 

 substance, 19; on the constitu- 

 tion of protoplasin, 39; on the 

 continuity of the constituent parts 

 of the cell, 48 



Willow, rudiments of roots in the 

 shoots of the, 382 



Zander, R., on polydactylism, 



430 

 Ziegler, Ernst, on the law of the 

 specific character of the tissues, 

 112; on tuberculosis, 390; on 

 polydactylism regarded as a germ- 

 variation, 430 



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J. S. Gushing & Co. — Berwick & Smith. 



Boston, Mass., U.S.A. 



