NOTES AND EPHIBITS. 173 



entogenie groups of other regions, and may profoundly modify the 

 character of the fauna or flora of special parts of Z. 



C. Archipelagic or Archaic Contours consisting of one or more 

 generally small and isolated "island" contours of no definite distri- 

 bution. These are the contours of archaic groups, and represent 

 the mountain-tops, as it were, of a once much larger and more con- 

 tinuous area of distribution. 



Mr. Tillyard exhibited maps showing the occurrence of different 

 types of A, B, and C in the Australian Region, constructed for 

 various groups of Odonata. He suggested that the separate types 

 should receive suitable names. 



Discussion postponed to next Meeting. 



