i5o 
AL0N0PSIS AMBIGUA IN NORFOLK. 
XVI. 
ALONOPSIS AMBIGUA, LILLJ., An Addition to the 
Cladocera of Norfolk. 
By Robert Gurney, B.A. 
Read 28 th February, 1905. 
Collecting was not carried out so energetically during the 
past year as in 1903, and some of the rarer species recorded 
in my list were not found again. Still, I have one species 
a. Side view of female, X 80 . 
b . Part of the Postabdomen, X 260. 
to add which is new not only to Norfolk but also to Great 
Britain. This species is Alonopsis ambigua, Lillj. The only 
species of the Genus hitherto recorded as British is Alonopsis 
elongata, Sars, which is found in North England but not in 
