evolution. Gen. Sub. 77, 
integration), and by means of variations in the interactions of such 
resultant systems with their surroundings ; Ryder (602). 
Discontinuous variation : Evidence of discontinuous saltatory varia- 
tion which itself varies continuously ; de Vries (719). — Discontinuous 
variations from one position of organic stability to another (Galton), 
will tend to be frequent, recurrent, and not readily swamped ; Perry 
Coste (118). — Dimorphism of Fora mini/era ; Lister (395), Rhumbler 
(575), Schaudinn (626). — Questions bearing on specific stability ; Galton 
(226, 227). 
Variation and specific stability ; Thiselton Dyer (169). The law of 
compensation ; Eimer (176) 
Individual variations in environmentally determined lines ; Henslow 
(294). — To estimate the effect of a small variation it is necessary to 
measure the percentage of young animals and of adults in which it 
occurs. Knowing the fate of destruction the advantage or disadvantage 
of the variation may be estimated; Weldon (741a). — V ariation-curve 
with two apices ; de Vries (721). — Variation in cleavage ; Morgan (476). 
Amphimixis is the condition for new combinations of the variable 
determinants, it tends to mitigate disadvantageous variability, and it 
affords scope for the action of natural selection ; Rohde (583). — An 
inherent error in the views of Galton and Weismann. They are based 
on the unfounded assumption that each sexual act brings together two 
totally dissimilar sets of factors, instead of factors which are identical 
in innumerable features for one in which they differ. The occurrence of 
a variation is due to the direct action of external conditions, but its 
precise character is not ; Brooks (74). 
Panmixia, an hypothesis founded on nothing ! ; Minot (449). 
Varieties of the human species ; Sergi (648). — Individual variations 
of Vertebrate embryos ; Meiinert (436). — A study in variation, 
Leuciscus balteatus ; Eigenmann (172). — Variation of Pleuronectes flesus 
and PI. platessa ; Duncker (165). — Variation of Etheostoma caprodes ; 
Moenkhaus (457). — Colour-variations of a beetle : “ Its several varieties 
exhibit that kind of definiteness and constancy to their respective types 
that we associate with the idea of species ; but for supposing that this 
constancy is in any way dependent on adaptation to environment, we 
have no warrant ” ; Bateson (23). — Variation and aberration in imago 
stage of butterflies, due to temperature and food ; Standfuss (667). — 
Variation of Haliclystus octoradiatus ; Browne (79). — Variation of 
Tentaculocysts of Aurelia aurita : Of Ephyrce about 22‘6 per cent, were 
abnormal (6-13 Tentaculocysts) ; of adults about 22*8 per cent, showed 
similar variation ; Browne (78). — Variability of calices in masses of 
coral ; Bell (33). 
Numerous variations, nine thoracic abnormalities, in one individual ; 
Helm (292). — Various forms of double monstrosity in embryos of 
trout, &c. ; Windle (763). — Significance of anomalies ; Dwight (170) 
—Albinism ; Haacke (269), Roth (593). 
Variety, form, race and aberration ; Qttolengui (504), Mansbridge 
(420). 
