CORRECTIONS. 

 P. 20, line 14— For 232\07\1 read 233\07\1. 

 P. 39, line 3 from bottom — For will read will. 



P. 43, Ime / — For — ^^ / ^ ,^ , read 



' 1. 2. 3. 4 



r {r + 1) W + 2) (y + 3) 

 1. 2. 3. 4 



p. 49, line 2-For "<" + 1> |" +/><"+ ^> read 



n 



{n + 1) (7^ + 2) {n + 3) 



1. 2. 3. 4 



P. 225, line 10 — For napsida read Synapdda. 



P. 290, line 5 from bottom — For first read second. 



P. 310, line 4 — For seem read seems. 



P. 318, line 3 — For 6?/ physiological conditions of the indi- 

 viduals read by the physiological condition 

 of the individual. 



