ERRATA 
Page 33, fourth line of legend inside Figure 6: inside should read outside. 
Page 72, line 11: 53.5 per cent should read 4'^. 5 per cent. 
Page 123, Figure 25: Milercertium campanula should read Melicertum campanula. 
Page 130, line 7 under the heading "Annulata and Vermes": Tomopteros should read Tomopterus. 
Page 155, Figure 55 : The symbol f orPalsemonetes vulgaris should be instead of • 
IV 
