DAPHNIAD^. 63 



Daphniadse, though he mentions that a species had been 

 observed before his time by Goedart, and named by him 

 "pou aquatiqne." * In his ' Historia Insectornm gene- 

 rahs,' pubhshed at Utrecht in 16G9, he gives a pretty full 

 description of a species of Daphnia, which is evidently 

 the Pidex. He calls it Pidex arhoreu>i or arborescens, the 

 first part of which name has been retained, and applied 

 to this species, by most authors who have written since 

 his time. His description is not very correct in some 

 points ; for he says the beak is slender and pointed, and 

 that it is by this sharp beak the animal draws up its food, 

 as it were by suction, like other aquatic insects. He de- 

 scribes, however, its motions very well, and mentions 

 the animal as occurring frequently of a red colour, or 

 of the hue of blood. This memoir of Swammerdam is 

 republished in his * Biblia Naturae,' where the same 

 figures are also given. f 



Merrett, in his 'Pinax rerum Britannicarum,' &c. 

 London, 1677, mentions the Daphnia3, or at least is said 

 to intend them, by the following short description : 

 " Vermes minimi rubri, aquam stagnalem, colore san- 

 guineo inficientes, unde vulgus dira portendit." 



Francisco Redi, in his ' Osservazioni utorno agli ani- 

 mali viventi die si trovano negli animali viventi,' Firenzi, 

 1684, gives three figures of a species which Miiller quotes 

 as the Pulex (his Pennata), but which are so very bad, that 

 it is difficult to make them out. He calls them by the 

 name of "Animaletti aquatici." In his ' Opere,' pub- 

 hshed at Napoh, 1687, he gives the same figures as in 

 the former work, and mentions them as " Tre animaletti 

 aquatici, che vivorno nelli acqua stagnanti, e ne' pozzi, 

 osservati col microscopia." 



Bradley, in his ' Philosophical Account of the Works 

 of Nature,' London, 1739, gives a long description of a 



* I have uot seen any notice of this little creature in any work of Goedart 

 that I have examined, and Straus remarks also that he had never been able 

 to procure the work in which the notice of this insect occurs. 



•f Vide Leyden edition, 1737. 



