80 M. S. BENJAMIN. 



I have to thank Mr. O. T. Musson who kindly helped me 

 to collect the nodules and other plant parts, which have 

 been examined, and who has been good enough to name 

 the various plants, and to make suggestions for carrying 

 on the work. 



References. 



Armstrong and Horton, Proc. Roy. Soc, Ser. B, 85, 1912, p. 109. 



Armstrong, Benjamin and Horton, Proc. Roy. Soc, Ser. B, 86, 

 1913, p. 328. 



G. Zemplen, Hoppe-Seyler's Ztschr. Physiol. Chem. 79, 1912, No. 

 3, pp. 229 - 234. 



K. G. Falk, Journ. Amer. Chem. Soc, 35, 1913, No. 3, pp. 292 



-294. 



