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fresh water for about five hours and afterwards hung up to dry, 
at the expiration of three days they were found to be still alive, 
and many of them had ejected the ova through the valves at the 
summit. The Dichelaspis orthogonia , Darwin, was like five or six 
other clusters previously obtained, attached to the axis of a species 
of Yirgularia, which seems to be the favourite habitat for this 
rare species. 
