66 Gen. Sub. 
I. GENERAL SUBJECTS. 
“ Selection is the all-sufficient principle on which the development 
of the organic world has been guided on its course” ; Weismann 
(562). 
Review of Weismann’s Allmacht der Naturzuchtung ; v. Wagner 
(551). 
Summary of the Spencer-Wcismann controversy ; Ciialmeus Mit- 
chell (360). 
Origin of species without the aid of natural selection ; Henslow (230). 
Heuslow on natural selection ; Wallace (552). 
Criticism of Drummond’s Ascent of Man ; Bather (26), Lynn Linton 
(133). 
Objections to natural selection ; Marquis of Salisbury (484). 
Panmixia discussed ; Weldon (567), Romanes (457), Wallace 
(555). 
Some interesting criticisms of evolution-theory from a breeder’s point 
of view. High (selective) breeding tends to a climax and then falls ; 
crossing at first beneficial, but is soon limited. Too little attention 
has been paid to the conditions which limit divergence ; Anon. (11). 
Evolution of social insects : Natural selection among colonies, social 
selection among individuals. Both forms of selection partly direotly 
utilitarian, partly secondarily useful, partly fortuitous ; Riley (454). 
Greouland insects : Number of dark- coloured forms explained by 
action of natural elimination, weeding out light-coloured individuals, ill- 
adapted to dark lichen-covered rocks ; Fernald (154). 
Observations and experiments as to value of protective coloration in 
Abraxas grossulariata ; Plateau (422). 
Sexual selection in Lepidoptera ; Seitz (506). 
Arguments from subterranean Crustacea iu favour of natural selection 
and against Lamarkism ; Chilton (91). 
Detailed study of the preseut operation of natural selection on man ; 
Ammon (6). 
e. Particular Problems. 
Origin of joints ; Tornier (535). 
Colours of butterflies in relation to mimicry, sexual selection, &c.; 
Marshall (334). 
Coloration of grass snake : There is exact correspondence between 
the rows of pigment spots and longitudinal sub-cutaneous vessels and 
their communications with deeper vessels ; Zenneck (588). 
Relation of mimetic to original form ; Dixey (123). 
Apparent mimicry ; Plateau (423). — False mimicry : True mimicry 
must be between animals living in the same district, under similar con- 
ditions, and occurring together at the same time of year ; and the 
mimicked form must possess means of defence which the mimicking form 
lacks. Examples of false mimicry; Plateau (423). 
