52 Gen. Sub. 
I. GENERAL SUBJECTS. 
Evolution of pigment; Bohn (51).—Chromatic adaptation ; Bohn (53); 
Wagner (688). 
Mimicry ; Fowler (202); Wagner (688). 
Pattern in feathers; Bonhote (59).—In butterflies 5 scales ; Sykes 
(645).—Pattern of wings in insects ; von Linden (381). 
Evolution in swimming birds ; Eimer & Fickert (169). 
Origin of visual organs ; Pizon (523). 
Seasonal phases of species ; Butler (90). 
Skeleton of Vertebrates ; Eimer (170).—Modification of bones of hind¬ 
leg ; Fuld (208).—Structure of bones ; Gebhardt (234). 
Evolution of auditory ossicles ; Gadow (215). 
‘Secondary adaptation 5 in anterior limbs of mole-cricket; Vaney & 
Conte (675). 
