SIDINA. 273 



many small joints, and projecting from the end of the beak ; 

 lower antennae small. 



The most common British species of this genus has been 

 found abundantly in the common drinking-water of Lon- 

 don, supplied from the New River and Highgate ponds (Dr. 

 Baird). 



Bosmlna longirostris, M tiller, sp. — Animal very small ; 

 carapace rounded behind, bulging in front, and terminating 

 below in a sharp point. Dr. Baird tells as that the motion 

 of this curious little creature through the water is caused 

 by numerous and very rapid strokes of its lower antennae. 



Bosmina Coregoni, Baird."* — Double the size of the 

 preceding j carapace rounded below • antennae fully longer 

 than the whole body. 



Lochmaben Castle Loch (Sir W. Jardine, Bart.) , 



The food of the Yendace. 



Subfamily Sidina, Baird. 



Furnished with six pairs of feet ; upper antennae of mode- 

 rate size ; lower antennae two-branched, a row of spinous 

 filaments springing from the edge of the larger branch. 



* A new species, lately described by Dr. Baird. 



T 



