252 THE MICROSCOPE. 



little on either side of it, amongst the miniature Days ai 

 pools formed by the sphagnum, on looking straight dov 

 into the water we shall probably see at the bottom a litt 

 mass of jelly of a bright green, studded with numeroi 

 brilliant bubbles of oxygen-gas. This is the gener 

 appearance of most of the desmidacece, as Micrasteria 

 Euastrum, Closterium, Cosmarium, &c. The spoon is aL 

 a handy tool in this case, though, by practice, the fingi 

 will do nearly as well ; the chief difficulty arises whe 

 the specimen is brought to the surface of the water, it IK 

 being easy to get it out without losing a considerable po 

 tion of it. Little pools in the bog, made by the footstej 

 of cattle, are particularly good spots to find desmidiec 

 many species being in a very contracted space. The moi 

 prolific bog is at Tunbridge Wells, near a house known i 

 Fisher's Castle, not far from Hurst Wood. There is also 

 good one at Eslier, at a spot called West-End. It mui 

 not be imagined that nothing can be obtained in th 

 department of botany without going some distance froi 

 town j but assuredly only commoner and fewer species ca 

 be met with nearer home. At the West India Docks ai 

 Synedra fasciculata, Gomphonema curvata, Diatoma elongc 

 turn, Diatoma mdgare, Surirella ovata, &c. ; and at th 

 same place a few objects, not of the botanical class, i 

 Spongilla fluviatilis, Cordyloplwra lacustris, Alcyondh 

 stagnorum, &c., are obtainable in abundance in the autumi 

 In the ornamental water in St. James's Park may be foun< 

 Gocconema lanceolatum, and other species of this genu 

 Gomphonema cristatum, &c. Epping Forest, about th 

 neighbourhood of Leytonstone, Snaresbrook, Wanstea< 

 and Woodford Bridge, are also capital localities for th 

 filamentous algse, especially the last-named, where Nitell 

 trcmslucens and Char a vulgaris abound." x 



On the north side of the Serpentine, Hyde Park, esp( 

 cially near the bridge, may be found : 



Cymbella maculata. 

 Gomphonema cristatum. 

 Scenedesmus quadricauda. 



,, obliquus. 



Ankistrodesmus falcatus. 

 Pediastrum Heptactys. 

 Cocconema lanceolatum. 

 Amphora ovalis. 



Cocconeis placentula. 

 Uvella liyalina. 

 Gallionella nummuloides. 

 Euastrum elegans. 

 Pixidula operculata. 

 Cladophora glomerata and Sphsn 

 plea crispa, with many ottw 



(1) "Quarterly Journal of Microscopical Science.' 



