4 G. 0. Sårs. 



my aquaria rather successfully, especially after an attempt 

 had been made to cleanse the mud from the superfluous 

 clay-particles by sifting it gently through a bag of fine 

 muslin. Among the several forms of Entomostraca raised 

 from the mud during the course of the summer, there were 

 also 4 different species of Phyttopoda belonging to the 3 

 leading groups of that suborder, and I propose in the present 

 paper to restrict myself to an account of these interesting 

 forms, intending to treat of the other Entomostraca in another 

 paper to be published shortly. 



The plates accompanying the present paper have been 

 prepared with the greatest care by the autographic pro- 

 ceeding, and all the habitus-figures are copies from coloured 

 drawings made from fresh, still living specimens, seen in 

 their natural attitudes. 



