CORRECTIONS, 

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

 P. 39, line 3 from bottom — For xdxl read uill. 



r. 4o, Ime /— l-or . , „ , read 



1. i. o. 4 



/• (/• + 1) (/• + 2) (/• + 3) 

 1. 2. 3. 4 



P. 49, line 2-For W.> + 1) (^ + 2) (.; + 3) 



1.2.3 



n (;? + 1) {n + 2) (;> + 3) 

 1. 2. 3. 4 



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



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



P. 310, line 4 — For sr em read seems. 



P. 318, line 3 — Ff)r In/ physiological conditions of the indi- 



ridvnh road by the physiological condition 

 of the individual. 



