ON COLLECTING OBJECTS. 



ticularly good spots to find desmidiece, many species being in a very 

 contracted space. The most prolific bog is at Tunbridge Wells, near 

 a house known as Fisher's Castle, not far from Hurst Wood. There 

 is also a good one at Esher, at a spot called West-End. 



It must not be imagined that nothing can be obtained in this de- 

 partment of botany without going some distance from town ; but 

 assuredly only commoner and fewer species can be met with nearer 

 home. At the West India Docks are Synedra fascicytata, Gomplw- 

 nema curvata, Diatoma elongatum, Diatoma vulgare, Surirella ovata, &c. ; 

 and at this same place a few objects, not of the botanical class, as 

 Spongilla fluviatilis, Cordylophora, lacustris, Akyonella stagnorum, &c., 

 are obtainable in abundance in the autumn. 



In the ornamental water in St. James's Park may be found, Cocco- 

 nema lanceolatum, and other species of this genus, Gomphonenta cris- 

 tatum, &c. Epping Forest, about the neighbourhood of Leytonstone, 

 Snaresbrook, Wanstead, and Woodford Bridge, are also capital locali- 

 ties for the filamentous algae, especially the last-named, where Nitella 

 translucens and Chara vulga/ris abound."* 



On the north side of the Serpentine, Hyde Park, especially near 

 the bridge, may be found : 



Cocconeis placentula. 



Uvella hyalina. 



Gallionella nummuloides. 



Euastrum elegans. 



Pixidula operculata. 



Cladophora glomerata and Sphaero- 



plea crispa, two of the filamentous 



algae, 



Mr. Topping, of New Winchester Street, Pentonville, has furnished 

 me with the following list of 100 interesting and popular objects pre- 

 pared by him : 



Fos. Infusoria from Guano. 

 Fos. infusoria, Barbadoes. 



Upper Bann, Ireland. 



Island of Mull. 



Tuscany. 



Infusoria from Thames mud. 

 Spicules of Gorgonia. 

 sponge. 

 ,, fresh water. 



Gemmules of a sponge. 



Cymbella maculata. 

 Gomphonema cristatum. 

 Scenedesmus quadricauda. 



obliquus. 



Ankistrodesmus falcatus. 

 Pediastrum Heptactys. 

 Cocconema lanceolatum. 

 Amphora ovalis. 



Tests : 



Navicula angulata. 



strigosa. 



formosum. 

 Scales of Podura. 



Lepisma. 

 Hair of Indian bat. 



,, mouse. 



Larva of Dermestes. 



Triceratium from Thames mud. 

 Arachnaydiscus. 



Section of shell Pinna. 

 ,, crab. 



Quarterly Journal of Microscopical Science. 



