On  Daphnia  Scheafferi,  wUh  a  Diagram.    By  (he  Bey.  A.  B.  Hogajt,  M^i,

So  few  observers  have  paid  any  attention  to  the  fiunily  to  which  this  little  aci-
mal  belongs  that  any  fresn  notes  on  its  habits  or  economy  are  acceptable.  In  cma-
mon  with  several  omer  allied  Entomostraca,  Ikwhnia  &fuBffen  bears  the  ¥!b^^^
name  of  <'  Water-flea,''  and  German  of  <*  Wasserfloh ;''  but  I  have  not  been  aUe  I0
discover  any  peculiar  suitability  in  the  appellation,  there  being  nothing  in  oonunoa
between  it  and  its  terrestrial  namesake,  except  restlessness.
