CHROMOSOMES, HEREDITY AND SEX. 
521 
68. Von Winiwarter, H. — “Spermatogenesis in Man,” ‘Arch. Biol.,’ 
xxvii, 1912, p. 91. 
69. Wodsedalek, J. E. — “Accessory Chromosomes in the Pig,” 
‘ Science,’ xxxviii, 1913, p. 30. 
70. Zarnik, B. — “ Uber die Chromosomencyklus bei Pteropoden,” 
‘Verhandl. d. deutsch. Zool. Gesellsch.,’ 1911; summarised by 
Schleip, ‘ Ergeb. nnd Fortschr. d. Zool.,’ iii, 1912, p. 250. 
