78 Gen . Sub . i. general subjects. 
c. Environment and Function, 
General physiology of environmental stimuli ; Herbst (295). — Envi- 
ronmental influence is oftenest important merely as a stimulus inducing 
the development of particular determinants ; Weismann (739).— External 
conditions have a direct influence on development, and are more than 
mere stimuli ; Hertwig (303). — Influence of environment on develop- 
ment ; Pfeffer (523).— Influence of surroundings on development of 
men and animals ; Schussler (639). — Action of gravity on nucleoli of 
lobsters’ eggs. The nucleolus always falls from its own weight to the 
lower side of the nucleus; Herrick (301). — Compression and the 
reverse ; their effects on animals ; Philippon (525). 
Light promotes oxidation-processes in animal cells ; Quincke (543). — * 
Action of light on animal life. Masella’s experiments. [Possible action 
on anti-toxins. See Physiological .]; Frankland (214). — Influence of 
light in “ producing ” pigments on the lower side of flat-fishes ; additional 
evidence ; Cunningham (128).— Influence of light on colour of pelagic 
Gasteropoda ; Simrotii (656). — Influence of colour on colour of cater- 
pillars ; SchrOder (638). — Influence of surrounding colour on cater- 
pillars, critical summary ; Garbowski (231). 
Influence of food on developing ants ; against Spencer’s theory of 
direct influence ; Wasmann (733). — Influence of starving on brain growth 
of young animals ; Bechterew (30). 
Effect of nutrition, temperature, &c., on growth of fishes ; Master- 
man (432). — Influence of temperature on incubation ; the time for the 
same species varies with the temperature, high temperature increases 
rate ; but development takes place even below zero, when the specific 
gravity of the water is sufficiently high to prevent it freezing ; Dannevig 
(136). — New experiments on seasonal dimorphism ; Weismann (739). — 
Influence of cold and warmth on pupae affecting colour of butterflies ; 
Weismann (739). — Experiments on influence of change of temperature 
on butterflies ; Fischer (201). — Influence of cold on pupae, producing 
glacial varieties (?) ; critical summary of Fischer ; Garbowski (231). — 
Food and temperature causing variation in butterflies ; Standfuss (667). 
Action of heat, various chemical reagents, &c., on bivalves ; Pi^ri 
(526). — Influence of low temperature on aquatic animals ; Regnard 
(567). — Effect of hard winter (1894-95) on the shore fauna ; Jourdain 
(331). — Influence of cold winter (1894-95) on the marine fauna ; 
Fauvel (188). — Effect of variations in external temperature on output 
of carbonic acid and on temperature of young animals ; Pembrey (518). 
— Acclimatisation of organisms to high temperatures ; Davenfort & 
Castle (139). — Thermotropism of Protozoa ; experiments with Para- 
mcecium aurelia and Euglcna viridis. To temperatures under 24° C., 
the Infusoriaus are positively thermotropic, and above 28° C., negatively; 
Mendelsohn (437). 
Injurious influence of chlorine vapour, bromine vapour, carbon di- 
sulphide, coaj gas, carbonic acid, &c., on eggs of insects ; Perroncito & 
