DISTRIBUTION AND ABUNDANCE 



73 



Table i 



SPAWN FOUND IN YEAR OF OBSERVATION 



X = Spawn found: O = No spawn found: — = No observation 



Pond Name 



Upper Ridge Hill 

 Lower PJdge Hill 

 Potters Bar Garden 

 Potters Bar Church 

 Potters Bar Park . 

 Grassfield House . 

 Potters Bar Parkfield 

 Catherine Bourne 

 Rabley Park Lodge 

 Green Street, N. . 

 Green Street, NE. 

 Green Street, SW. 

 Green Street Large 

 Green Street Footpath 

 Green Street Lyndhurst 

 Stag HiU . 

 Battlers Green L. . 

 Battlers Green Star 

 Battlers Green Tree 

 Battlers Green Marsh 

 BluebeU Wood . 

 Medbum 

 Pylons 

 Dagger Lane 

 West Railway West 

 West Railway 

 East Railway 

 Letchmore Heath, S. 

 Letchmore Village 

 Aldenham School 

 Letchmore Hilltop 

 Elstree, Two Bush 

 Elstree, Hedge 

 Elstree Circular . 

 Folly Farm Stream 

 Elstree, One Oak . 

 Elstree, Two Fence 

 Elstree, Long 

 Elstree, Centre Field 

 Elstree, Willow Tree 

 Elstree, Enclosure . 

 Queensbury Lodge 

 Rowley Green Gorse 

 Rowley Green, S. 

 Boys Hill, E. 

 Boys Hill Central. 

 Boys Hill Holly Bush 

 Arkley Stile. 

 Arkley Brickpit . 

 Bottom Corner . 

 Gladwyns Farm, W. 



1929 



1930 



O 



1931 



1932 



o 



1933 



1934 



1935 



o 



X 



O 



X 



X 



O 

 O 

 O 

 O 

 O 



X 



O 

 O 

 O 



X 



O 



o 

 o 

 o 

 o 

 o 



o 



1936 



1937 1938 



o 

 o 



o 



X 



o 



X 



o 



X 



O 

 O 

 O 



o 



X 



o 

 o 

 o 

 o 



X 



o 

 o 

 o 

 o 



X 

 X 



O 

 O 



O 

 O 



O 

 O 



o 

 o 

 o 

 o 

 o 

 o 

 o 

 o 



o 

 o 

 o 

 o 

 o 

 o 



X 



o 

 o 



o 



X 



o 

 o 

 o 



X 



X 



o 

 o 

 o 

 o 



X 



o 

 o 

 o 

 o 

 o 



X 

 X 

 X 



O 

 O 



X 



O 

 O 

 O 

 O 

 O 



o 

 o 



X 



O 

 O 

 O 



o 

 o 



X 



O 



o 

 o 

 o 

 o 

 o 

 o 

 o 



X 

 X 

 X 



O 

 O 



X 

 X 



O 

 O 

 O 

 O 



X 



O 



X 



O 

 O 

 O 



X 

 X 



O 

 O 

 O 



X 

 X 



O 



X 



O 

 O 



O 

 O 

 O 



X 



O 

 O 

 O 

 O 



o 

 o 



X 

 X 



o 

 o 

 o 

 o 

 o 

 o 

 o 



6— (T.914) 



