BIOCHEMICAL STUDIES OF PHYLOGENY 



117 



In Spirogr aphis brevispira 2-83 g of the body gave 0-768 mg 

 of total phosphate of which 63% was due to phosphagen. Another 

 estimation from 3-08 g of body gave 0-925 mg of total phosphate 

 of which 67% was due to phosphagen. 



Table 1. Selected from information in Needham, Needham, 

 Baldwin and Yudkin (1931) showing the amounts of inorganic 

 and organic phosphorus-containing compounds in various 



invertebrates. 



In Nereis diversicolor seven normal animals were taken in which 

 the phosphagen ranged from 15% to 81% of the total phosphate. 

 It is of interest that in these measurements the authors found that 



