EVOLUTION. 
Gen. Sub. 65 
on eggs—a vital reaction simulating cleavage; Morgan (552).—Influence 
of akridin-derivatives on Infusorians; Danielsohn (153).—Indirect effect 
of solution of lithium etc. salts on developing ova of Loligo ; Schimke- 
witsch (693). 
Modifications due to salt marshes of Lorraine; Florentin (240).— 
Effect of soil on animals; on predominantly siliceous non-calcareous 
ground (Monts Lyonnais) certain kinds of animals, e.g. Pulmonates, tend 
to be less numerous in species and individuals, smaller in size, with 
reduced shells etc.; Roux, J. A. Cl. (673). 
Modifications of Crepiclula ; Conklin (134).—Experiments on Lepido- 
ptera; Fischer, E. (234), Frings (252), Gauckler (267), Hofmann (359), 
von Linden, (456), Standfuss (740).—Influence of scarcity of air on the 
early stages of development; Schultze (701).—Influence of nutrition on 
Euglena gracilis ; Zumstein (857).—Influence of currents on locomotor 
behaviour of animals; Dewitz (172).—Summary as to influence of external 
conditions etc. on the determination of sex; Henneberg (326).—Hastening 
the development of hibernating pupae; Gauckler (267).—Modification of 
races by environment; Lombroso (479). 
Influence of low temperature on the development of the frog ; Schultze 
( 705).—Summary as to experiments on influence of temperature on 
insects; Staudinger (741).—Effect of cold on metabolism; Moore (544). 
—Effect of freezing on developing eggs of fowl, see Experimental Em¬ 
bryology ; Rabaut (633).—Influence of temperature in promoting varia¬ 
tions of Lepidoptera; Urech (775). 
Experiments on coloration; Urech (775).—Relation between colour of 
environment and colour of chrysalids; Bordage (76). 
Blind animals in caves; Vire (796).—Influence of light and darkness on 
Euglena gracilis ; Zumstein (857).—Colour relation between pupae and the 
surroundings of larvae ; Merrifield & Poulton (529).— Influence of light 
on coloration of Vanessa jo ; Kathariner (390).—Influence of light on 
the deposition of pigment; List (457).—Influence of different kinds of 
light on organisms; Flammarion (235). 
d. Selection ancl Isolation. 
Selective death-rate in man; demonstration of the operation of natural 
selection; Beeton & Pearson (54).—So-called exuvial selection; Bordage 
( 72).—Sexual selection has brought it about that parts of the body tend 
to be more variable in proportion as they are of greater aesthetic value; 
Brewster (85).—Natural selection; Brooks (89).—Evidence of selective 
elimination in sparrows. The process of selective elimination is most 
severe with extremely variable individuals, no matter in what direction 
the variations may occur. Disregard of structural qualifications finally 
produces a throng of degenerates, whose destruction w T ill follow the 
arrival of adversity; Bumpus (95).—Criticism of germinal selection; 
Celesia (115).—Criticism of Weldon’s evidence of the operation of 
Natural Selection; Cunningham (144).—Is Natural Selection all meta¬ 
phor? ; Ewart (216).—Insufficiency of Natural Selection; Henslow (328). 
—Lamarckians and Darwinians, discussion of rival theories; Le Dantec 
( 433).—On reproductive or genetic selection; Pearson (598).—Import 
and efficiency of the selection-principle ; Plate (617).—Scope of Natural 
Selection; Tayler (755).—Nutrition and Selection; De Vries (800).— 
The utility of specific characters; Wallace (804). 
e. Particular Problems. 
Origin of the animal body; van Velzen (784).—Adaptation of tissues 
to mechanical conditions; Beneke (57).—Data for the problem of evolution 
1899. [Vol. xxxvi.] b 9 
