14 I'liKSll WAT I ".It 1,1 1- K. 



U)04. 



2 or 3 ;i[)eoimens Doeidiniu rectaiii. 



2 specimens Hurrirella splendidu, and a number of chy- 



dori. 



Specimen No. 15. 

 Taken from a running brook July 18th, 1U03; examined May 

 10th, 1904, antl subjected lo the same conditions asNos. 1 and 2, 

 except that this specimen contained vegetation in abundance 

 taken at the same time and jthice: 



4 Micrasterae Americana;, greeri and bright, 

 Cii'Sterium venus, scane living, some dead, 

 2 (Mo-^ter aceros. living, moving, green, 

 '■ Diana', some alive, some dead, 



2 '■ costatum, living. 



Diatoms. 

 Nav. (Uictyl Subgigas frustules, 



'• Viridis, alive, moving, 



•• Viri<lis frustules, 

 Stauroneus phreneocentron frustules. 



Other forms. 

 A number of em[)ty chydorus shells, 

 5cyprids, one young one. all lively, 

 24 chydori, one young one, all liv>'ly, 

 H Cyclops, lively as ever. 

 A number of [)ai'ainecia. 

 34 Pterodina' patina', all lively, 

 1 •• •• <lead, 



17 Anguilluhe, lively as ever, 



3 Rotifera vulgaria, lively and feeding, 

 ') Tubellaria worms, very lively, 



1 water mite, lively, 



1 Planorbus deflectus, dead, 



1 Microbiotus Americanus, lively, busy feeding. 

 And I suppose I might have discovered many other f(.)rms if 

 the examination had been more protracted and careful. 



