16 FUE?JH WATKR LIFE. 



Desmids. 



None. 



Diatoms. 



2 Stauroneus phoeneocentron, recent, 



Innumerable Nav. Subgigae, both recent and frustules, 



1 Fragillaria capucina, 



1 Nav. cardinalis, shell. 



Several Nav- Viridis, recent. 

 Other fornis. 



1 Daphnia pulex, lively. 



1 Parameceum bursarium, 



Many Parameceum vulgare, 



Many chydori, living and active. 



Many chydorus shells. 

 Quite a large number of Anguillulse, tubelaria worms, Hy- 

 drachnse belostomse, rotifera vulgaria, vorticellffi and a species 

 ihat I have never seen before, and that I can not find in any 

 book I have on the subject. It evidently belongs to the Hy- 

 drachna family, but it is clear, transparent as glass, much 

 broader than long, and runs sidewise, seemingly as well one 

 way as the other, and is muth more lively and rai)id in its gait, 

 rnfortunately an accident haj^pened to the slide before I was 

 able to examine more closely or }»iit in a more powerful object- 

 ive. I found iilsi) 1 nctinoplirv sol. 



Specimen No. •"). 

 Put upvSept.. lyOl; examined Dec. 17th. 1004. 

 This specimen was put up as follows : The bottom of a 

 large milk basin was covered with about one inch of sand and a 

 few stones plnced in it. The water from a running stream was 

 added lo nearly fill the basin, and Dichelyma capeliceum plant- 

 ed in the sand, and the following j)lants floated on the water 

 enough to cover the whole surface thickly — Lemna triaulcha, 

 Vaucheria.. Nitella, Lemna minor, Salvinianatans, Riccia natans 

 and Riccia fluitans. The basin was placed on the table beside 

 No. 4. The watergrass in No. 4 grew and ran over the edge into 

 No. o and took root there, and after it bad sot well rooted I took 



