VORTRAGE UBER BOTANISCHE STAMMESGESCHICHTE 83 
the book from this point of view is enhanced by the numerous 
figures. These greatly diminish the labour of looking up the 
original sources. 
urning to more specific criticisms, a word may be said of the 
excessive detail with which some parts of the subject, and these 
described in some groups, but in others put so briefly as not to 
- Lotsy lays great weight upon differences in the ¢ 
reproductive cells as indicating affinity, and this we venture to 
think has him i i ptions. The 
led into some very unlikely assumptions. 
