54 POND LIFE : ANUB^A LONGISPINA. 



for his compnlsoiy visit to town, either the distance travelled or the 

 mode of transit being unsuited to his well-being. 



Diatoms are mostly present in the pretty stellate species, Astcrionella 

 formosa, with a few specimens of Synedra and Pleurosigma, while 

 desmids are fairly plentiful in the beautiful forms of Pediastrum 

 gramtlatum a,nd Hijalothi'ca ; Pundorina moruni, ClatJirocj/stis, and other 

 algae have also been found. 



It may not be out of place to remark that a recent visit to Olton 

 reservoir yielded most of the good finds of last year, not omitting 

 Leptodora hyalina and Hyalodaphnia Kaldberr/fiisis, the former translucent 

 beauty being scarce, but the latter abundant, with other rare entomostraca, 

 and that at the " KoU Call" the only missing friends were Anurcea 

 longispina and Ceratium longicorne, a gap well filled up from an unex- 

 pected source. 



Possibly some who take great interest in the purity of the water 

 supply of Birmingham may feel alarmed by this aomewhat formidable 

 list of "dreadful sounding" names of the living organisms it contains, but 

 perhaps it may help to comfort them to suggest that the presence of these 

 organisms should rather be taken as indicative of the general good 

 quality of the water than otherwise, as some of them, at least, are at 

 home and abroad known as the inhabitants of deep, clean water only. 



