2 i8 CAUSES OF VARIATION 



EVOLUTION ON PREDETERMINED LINES. By T. D. A. Cockerell. Science, 



XIII, 311-312. 

 EXPERIMENTAL STUDY OF VARIATION. By J. C. Ewart. Report of the 



British Association for the Advancement of Science, LXXI, 666- 



680. 

 EXPERIMENTS IN CROSSING CORN AND WATERMELONS. By F. C. Card 



and G. E. Adams. Experiment Station Record, XIII, 740. 

 EXPERIMENTS UPON THE INFLUENCE OF THE SEXUAL CELLS UPON THE 



SOMATIC. By G. W. Field. Biological Bulletin, II, 346-347. 

 HETEROTYPICAL DIVISION IN MATURATION. By T. H. Bryce. Report 



of the British Association for the Advancement of Science, 1901, 



pp. 685-687. 



HYBRIDIZATION OF CORN AND WATERMELONS. By F. C. Card. Experi- 

 ment Station Record, XI, 928. 

 HYBRIDIZING MELONS: EFFECT IN SUGAR CONTENT. Experiment Station 



Record, XVI, 229. 

 HYBRIDIZING ZEBRA AND HORSE. (Experiments of Baron de Parana in 



Brazil.) Experiment Station Record, XI, 972. 

 INDIVIDUALITY OF CHROMOSOMES. By H. Metcalf. Proceedings of the 



Nebraska Academy of Science, 1901. 

 INHERITANCE IN PARTHENOGENESIS. By Ernest Warren. Proceedings 



of the Royal Society, LXV, 154-158. 

 ORGANIC SELECTION. By J. M. Baldwin (Science, IV, 724-725 ; V, 



634^-636), E. D. Cope (Science, II, 124), and H. F. Osborn (Science, 



vi, 583-587). 



ORTHOGENETIC VARIATION. By H. F. Gadow, Cambridge. Science, 



XXII, 637-640. 

 ORTHOGENETIC VARIATION IN CERTAIN MEXICAN SPECIES OF LIZARDS. 



By H. F. Gadow. Proceedings of the Royal Society, LXXI I, 109-126. 

 PHYSIOLOGICAL SELECTION. By G. J. Romanes. Science, VII, 606-608. 

 PREMATURE FERTILIZATION INJURIOUS TO FRUIT. Experiment Station 



Record, XIV, 634. 



PROBLEM OF DEVELOPMENT. By E. B. Wilson. Science, XXI, 281-293. 

 SECONDARY SEXUAL CHARACTERS. (A study of the effects of castration.) 



By S. G. Shattuck and C. G. Seligmann. Proceedings of the Royal 



Society, LXXI 1 1, 49-58. 

 SEXUAL REPRODUCTION ; DISTINCTION FROM ASEXUAL. By Richard 



Hertwig (translated by W. C. Curtis). Science, XII, 940-946. 

 SONG OF BIRDS KEPT FROM THEIR OWN SPECIES. By William E. D. 



Scott. Science, XIX, 154. 

 STERILE FRUIT BLOSSOMS. By S. A. Beach. New York Station Bulletin, 



CLXIX, 33I-37L 



STERILITY OF CATTLE, CAUSES OF. Experiment Station Record, XI, 289. 

 TELEGONY. By J. C. Ewart. Proceedings of the Royal Society, LXV, 



243-251. 



