_System of the Siphonophoræ_, the, 249 _Systematic Phylogeny_, the, 291 T Tadpole, the, 220 Teeth in young parrots, 223 Teneriffe, 240 Terminology created by Haeckel, 36 Theological critics of Haeckel, 298, 305 Theology, Haeckel’s rejection of, 75-6 _Tiara_, 176 Tierra del Fuego, 103 _Tissues of the Craw-fish_, the, 77 Tjibodas, 260 Training, early, of Haeckel, 32 Transformism, 111 Translations of Haeckel’s works, 294 “Travel Pictures,” 84 Travels of Haeckel, 256 Tree-frog, the, 119 U Unicellular animals, 94, 98 Unity of nature, the, 235 Unnucleated organisms, 180 Utrecht Society of Art and Science, 248 V Venus of Milo, the, 191 Vienna, medical studies at, 80 Villefranche, fishing at, 76 Virchow, Rudolf, 56, 72 〃 at Stettin, 153-171 〃 Haeckel’s conflict with, 74 〃 on the evolution of man, 311 _Visit to Ceylon_, the, 259 Vital force, the, 135 Vogt, 83, 154 Volger, Otto, 167 W Wallace, A. R., and Darwin, 123 Weimar, Grand Duke of, 254 _Wonders of Life_, the, 292, 313 Works, number of Haeckel’s, 299 Worm, evolution of the, 276 Würtzburg, Haeckel at, 54 〃 , invitation to the University of, 253 Z Zipangu, 20 Zoological Institute, the, 42 〃 philosophy, 194 〃 Station at Naples, 59 Zoology, reconstruction of, by Haeckel, 24 〃 , the old and the new, 60 UNWIN BROTHERS, LIMITED, THE GRESHAM PRESS, WOKING AND LONDON. ------------------------------------------------------------------------ ● Transcriber’s Notes: ○ Missing or obscured punctuation was silently corrected. ○ Typographical errors were silently corrected. ○ Inconsistent spelling and hyphenation were made consistent only when a predominant form was found in this book. ○ Text that: was in italics is enclosed by underscores (_italics_).