64 BRITISH ENTO.MOSTKACA. 



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

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

 and " legs like the claws of an eagle ;" the large antennae 

 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 we did not only observe the young 

 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 

 Daphnia pulex. 



Trembley, in his ' Memoires pour servir a 1'histoire 

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

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

 Puceron branch u, which seerns to be the favorite food of 

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

 is the Daphnia pulex, and his observations on this subject, 

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

 ' Micrographia Illustrata,' published in London, 1740. 



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

 describes the same species shortly, under the name of 

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

 1st edit. 1746, and f Entomologia Faunae Suecicae, 1789, 

 he again describes it under the name of Monoculus pulex. 



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

 1753, describes and figures a species, which is evidently 

 the J). fiidcT. lie maintains that it has two eyes, and 

 severely handles poor Bradley for saying it has only one, 

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

 scription ! He 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 

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

 under the name of Pan aquafu/i/e, which M tiller quotes 



