478 Proceedings of the Royal Physical Society. 



70. Zacharias, 0. Experimentelle Untersuchungen iiber Pseiido- 



podien Bildung. Biol. Centralblt., v. (1885), pp. 

 259-262. 



Modifications of cells by external reagents. Cf. bis references 

 to Sclmeider, Brass, Kiihne. 



{h.) Food (71-111). 



71. Balbiani, E. G. Observations relative a nne note recente de 



M. Maupas, sur la multiplication de la Leucophrys 

 'patiila. Comptes Rendiis, civ. (1887), pp. 80-82. 

 Deficient nutrition, followed by encystation of Infusorian. 



72. Barfurth, D. Biologie der Forellen. Arch. mikr. Anat.' 



xxvii., pp. 121-178. 



Connection of nutrition, etc., and sterility. 



73. • . Experimentelle Untersuchungen iiber die 



Verwandlung der Froschlarven. Biol, Central bit., vi. 

 (1886), p. 609. 

 Influence of fasting on development. 



74. . Die Riickbildung des Froschlarvenschwanzes 



und die sogenannten sarcoplasten. Arch. mikr. Anat., 

 xxix. (1887), pp. 35-60, 2 pis. 



Reduced nutrition associated with death of tissues in absorp- 

 tion of tadpole tail. 



75. . (a.) Yersuche iiber die Verwandlung der 



Froschlarven. (6.) Der Hunger als forderndes 

 Princip in der Natur. Arch. mikr. Anat., xxix. 

 (1887), pp. 1-34, 1 pi. 



Fasting shortens tadpole metamorphosis, and is an especially 

 important factor in shortening the last stages. Other 

 cases. 



76. Born, G. Experimentelle Untersuchungen iiber die Enste- 



hung der Geschlechtsunterschiede. Breslauer arztliche 

 Zeitschr. (1881), No. 3 fF. Kosmos, viii. (1881), 

 pp. 65, m. 



Increased nutrition favours males ! {Cf. Yung, etc.) 



77. Ritzema-Bos, T. Untersuchungen iiber Tylenchus devastatrix. 



Bioh Centralblt., vii. (1887), pp. 232-243. 



T)^lenchi which have been restricted for generations to one 

 kind of plant, come to differ in form and size from the 

 same species on other plants. Slight changes appear iu 



