OF THE EAST NORFOLK RIVERS. 
413 
of any species. Probably the bottom fauna is equally poor, 
owing to the strong scour of the tide leaving no soft mud 
and allowing no vegetation to grow. Here are three col- 
lections which fairly illustrate the conditions at the mouth of 
the Bure. All three were made at the Yacht Quay. 
(1) April 27th, 1901. Low water. 
SlMOCEPHALUS VETULUS. 
Ceriodaphnia quadrangula. 
Bosmina longirostris. 
ClIYDORUS SPH.ERICUS. 
Cyclops strenuus. 
,, LEUCKARTI. 
Diaptomus vulgaris. 
Eurytemora laclnulata. 
Tachidius littoralis. 
Ecti nosoma sp. 
(2) April 28th, 1903. Three-quarter ebb. 
(Chlorine 416.3 grs. per gall.). 
Daphnia longispina. 
Eurytemora lacinulata. 
Tachidius i.ittorai.is. 
Laophonte littorale. 
Stenhelia hispida. 
Neomysis vulgaris. 
(3) June 8th, 1903. Flowing tide. 
(Chlorine 862.8 grs. per gall.). 
Cyclopina littoralis. 
Eurytemora affinis. 
Centropages hamatus. 
Temora longicornis. 
Parapontella brevicornis. 
Acartia longiremis. 
Gnathia maxillaris. 
Carcinus maenas. 
Crangon vulgaris. 
Of course these collections do not pretend to be any more 
than samples indicating the general composition of the fauna 
