As these pages are going to press, I am able to add that I have seen in Paris a very interesting and striking restoration of the appearance in the flesh or during life of the head of the man of the Chapelle-aux-Saints, carefully modelled in Professor Boule’s laboratory by a young sculptor, by applying his clay to a cast of the completed restoration of the skull. It is, I understand, proposed to publish this restoration firstly as strictly determined by anatomical fact and devoid of hair, and then to add the hair of the scalp, the eyebrows, eyelashes, and beard, and to place artificial eyes in position. We shall thus get a representation of this ancient race or species of man, based on the sure foundation of the actual bones. Fanciful portraits of “primitive man” have before to-day been produced by some imaginative artists, but this will be the first portrait of him with an inner framework of truth. INDEX Amœba, term applied to proteus animalcule, 194 Andrews, discoveries of, with regard to ozone, 252 Animalcules, bell, unicellular structure exemplified in, 197-199 ciliated unicellular, graceful movements of, 207 dried, examples of “suspended animation” in, 168, 169 proteus, processes of protoplasm in, 195 sun, processes of protoplasm in, 195 unicellular plants and, essential differences between, 204-207 Animals, aquatic, excess of egg production to ensure survival to maturity, 143, 144 aversions and cautious proceedings of, 269 blindness of, congenital, 272, 273 colour-protection and invisibility of, 304, 312 “concealment” and “warning” marks, distinction between, 310-313 destructive invasions made by various, 339, 340 devices adopted for protection of young by, 138, 139, 144 domesticated, reasons for continued congenital defects in, 271, 272 hibernation of, 165, 166 lower, various thread-producing, 293, 294 mankind and, causes of congenital defects in, 273 parthenogenetic powers possessed by certain, 330, 331 poisonous, methods of self-protection used by, 101 “warning” coloration possessed by, 107 propagation of, 132-137, 144-145, 329-330 sleep of, salient features connected with, 161-164 structure of multicellular and unicellular, comparisons between, 207-208 unicellular, uses made of cilia by, 194-197, 207 wild, congenital defects less obvious in, 271, 272 wood-boring, 346, 347 _Anopheles_ Gnat, 3 Ants, aphides and, friendship between, 324, 325 Aphides— enemies of, 319, 325 hop-blight caused by species of, 317, 319 parthenogenetic propagation of, 326-327, 330, 334, 336 rapid propagation of, 326, 338 relationship of _Coccidæ_ to, 322, 323 secretive productions of, 323-325 various species of, 322 Archæology, discoveries in connection with pre-historic man, 371-372, 391, 394-395, 398, 400, 402 Art, knowledge compatible with, 45 Astronomers, stupendous nature of work, 224