66 BRITISH ENTOMOSTRACx\. 



Goeze, in the ' Naturforscher,' 1775, describes the 

 same species, under the name which Swammerdam had 

 given to it, the I^iilex arborescens ; and Sulzer, in his 

 ' Abjekiirzte Geschichte der Insecten,' 1776, gives a very 

 indifferent figm-e of what he calls Monoculus jye^/e-^, but 

 which is evidently the Daphnia vefida. 



Miiller, in his paper on the Cypris, in the ' Philoso- 

 phical Transactions' for 1771, has enumerated several 

 species of Daphnia as occurring in Norway and Denmark, 

 but under the general name of Monoculus. In 1776, 

 however, he estabhshed the genus Daphne, in his 'Zoologise 

 Danicae prodromus,' and enumerated eight species, only 

 three of which had ever been noticed before his time. 

 In his ' Entomostraca,' 1785, he adds one other species, 

 gives figures of all the nine, and a lengthened description 

 of each. He changes the generic name from Daphne to 

 Daphnia, which latter name has been adopted by suc- 

 ceeding authors, and alters the specific names of two 

 species, though without good reasons for doing so. 



De Geer, in vol. vii of his ' Memoires pour servir a 

 I'Histoire des Insectes,' 1778, gives a good many details 

 concerning this family, pointing out two or three errors 

 into which Swammerdam had fallen, and giving very 

 accurate descriptions of some portions of their anatomy. 

 He describes at length, and figures very nicely and with 

 considerable faithfulness, four different species, two of 

 which, previous to this, had only been noticed by Miiller, 

 in his * Zoolog. Dan. prodrom.' 



Blumenbach, in his ' Handbuch der Naturgeschichte,' 

 1779, mentions one species, the j?j?^/ftx^- and Eichhorn, 

 in his ' Beytrage zur Naturgeschichte der kleinsten 

 Wasserthiere,' 1781, gives a tolerable figure of the same 

 species. 



Gmelin, in his edition of the ' Systema Naturae,' 1788, 

 gives all the nine species of Miiller, and adds to them the 

 Moiiocidm pecUcuhis, which Miiller had already formed 

 into a genus by itself, the Polj/phemus. 



Manuel, in the 'Encyclopedic methodique,' 1792, 



