KRRATA. 
Page IIS, in description of Fig. 7 read 
1/2 for l/i, and in that of Fig. 8 read 
slightly more than before natural size. 
Page 124, line 13 from bottom, for R. M. 
Webster read R. L. Webster. 
Page 136, line 14, dele inornata. 
Page 137, line 8, for gibbosa read gib- 
bosus. 
