G4 BRITISH ENTOMOSTRACA. 



" wonderful insect which had but one eye," found in tlie 

 river Thames, with a " head somewhat like that of a bird," 

 and " legs like the claws of an eagle ■" the large antennge 

 are described as " two branches, resembling the dugs of 

 animals," and which, he says, " we might suppose were 

 designed for suckling their young;'' "for this insect," 

 he adds, "is viviparous, which is contrary to other insects 

 before mentioned ; for vre did not only observe the yoang 

 ones alive in the belly of the mother, but likewise saw 

 several of them excluded from her body." The figure 

 which he gives is equally good as his description, both of 

 them showing the force of imagination, for it is evident 

 this " wonderful insect" is nothing more than the 

 Baphnia pulex. 



Trembley, in his ' Memoires pour servir a I'histoire 

 d'un genre de Polypes d'eau douce,' 1744, takes notice 

 of, and figures, a species of Daphnia under the name of 

 Piiceron branchu, which seems to be the favorite food of 

 the polypus, as they devour them in great numbers. It 

 is the Daphiia pukw, and his observations on this subject, 

 and figures also, are quoted and copied by Adams, in his 

 ' Micrographia Illustrata,' published in London, 1746. 



Linnaeus, in his ' Systema Naturae,' 4th edition, 1744, 

 describes the same species shortly, under the name of 

 Monoculus pulex arborescens, and in his 'Fauna Suecica,' 

 1st edit. 1740, and 'Entomologia Faunae Suecicae, 1789, 

 he again describes it under the name oi Monocidus 2mlex. 



Baker, in his 'Employment for the Microscope,' 1st edit. 

 1753, describes and figures a species, which is evidently 

 the D. jy^^/f^i'. He maintains that it has tw^o eyes, and 

 severely handles poor Bradley for saying it has only one, 

 though that is about the most correct part of his de- 

 scription ! lie quotes Swammerdam's memoir, and retains 

 his name for it, as expressive of its appearance and 

 motion. 



Joblot, in his ' Observations d'Histoire Naturelle, faites 

 avee le Microscope,' 1754, describes a species of Daphnia 

 under the name of Pou aquatique, which Miiller quotes 



