EVOLUTION. 
Gen. Sub . 57 
life. Effects of altered pressure, constitution, &c., of air on organisms. 
A summary of present state of knowledge ; De Yarigny (677). — Influ- 
ence of aeration on size of Lymncea ; Willem (716). — Influence of 
temperature and nutrition on freshwater fishes ; Knautiie (367). — 
Influence of light on development of organs ; Loeb (421). — Seasonal 
variations in plankton; Hjort (337). — Translation by W. E. Nicholson 
of Weismann’s new experiments on the seasonal dimorphism of Lepido- 
ptera ; Weismann (706). — Modifications of species of Vanessa under 
stimulus of heat ; Urecii (673). — Biological action of Rontgen Rays ; 
Capranica (102). 
Influence of lecithin on growth; Danilewsky (149). — Modifications 
produced by life iu caves ; Yire (683). 
d. Selection and Isolation . 
Contribution to the theory of selection ; Ammon (14). — Organic 
selection ; criticism ; Niciiols (497). — Organic selection ; Baldwin 
(30). — Answers to criticisms on “ organic selection ” ; Baldwin (36). 
— Discussion of natural selection; Ortmann (513). — Scope of natural 
selection ; Mivart (475). — Darwin and natural selection ; Poulton (545). 
— A philosophical selection-theory ; Unbeiiaun (672). — Mechanical 
selection and other problems ; Jordan (353). — Survival of the unlike; 
Bailey (25). — The struggle for existence ; Mazzarelli (451). — Struggle 
for existence, reflex bleeding and other meaus of defence in insects ; 
Cuenot (138, 139). — The endeavour after well-being ; various aspects of 
the wide concept of struggle ; Thomson (666). 
Causes of the separation of species ; Saint-Loup (596). 
Sexual selection ; Rosenfeld (578). — Reproductive selection ; Pear- 
son (525, 528). 
Germinal selection, exposition of ; De Yarigny (676). — Germinal 
selection ; Weismann (703-705). — VVeismaun on germinal selection ; 
Conklin (126). — Panmixia, mathematically considered ; Pearson (524). 
The loss of old characters in phylogenetic series ; Hyatt (345). 
The problem of utility. Are specific characters always or generally 
useful ? Conclusion that “ There is an overwhelming probability in 
favour of the statement, that every truly specific character is or has been 
useful, or, if not itself useful, is strictly correlated with such a 
character”; Wallace (694). — Utility of specific characters ; Thiselton- 
Dyer (661), Wetterhan (711), Lankester (395), Pearson (527), 
Cockerell (123), Weldon (707), Meldola (455), Cunningham (141), 
Garstang (250, 251). — Utility of minute specific characters in masked crab 
( Corystcs cassivelaunus) ; Garstang (252). 
Discussion of isolation ; Ortmann (512). — Isolation in terrestrial 
Molluscs of Galapagos Islands ; Dall (148). 
Extensive migration as a check upon the production of geographical 
varieties ; Montgomery (478). 
e. Particular Problems . 
Influence of mind in evolution ; Eita (5). 
Origin or evolution of man, with criticism of Haacke’s “ Schopfung 
des Menschen”; Wasmann (699). — Human evolutional! artificial process; 
Wells (709). — Present evolution of man ; Reid (560), Lankester 
(394), Reid (561). 
Social life of wasps, evolution of ; Marciial (438). 
Evolution of bird-song ; Witch ell (726). 
.Etiology of galls ; considered in relation to transmission of acquired 
characters and variation ; Beijerinck (55). 
