xlvi PBOCEEBIKGS OF THE 



' Die Algen des siissen Wassers nach ihren Entwickelungsstufen 

 dargestellt,' Bamberg, 1814, 8yo, was speedily followed by a much 

 more important work in 4to, entitled ' Das System der Pilze und 

 Scbwamme,' Wiirtzburg, 1816. By these works he became so 

 favourably known, that in 1818 he was appointed Ordinary 

 Professor of Botany, and Director of the Botanic Grarden of the 

 University of Erlangen, where he published, as an introduction to 

 his first course of lectures, a ' Synopsis specierum generis Asterum 

 herbacearum, prsemissis nonnullis de Asteribus in genere, earum 

 structura et evolutione naturaU,' Erlangse, 1818, 4to, which he 

 enlarged in 1832 into a much more important book on the same 

 subject, under the title of ' Genera et Species Asterearum,' 

 Vratislavise, Svo. In the same year, 1818, he was appointed 

 editor of the ' Nova Acta Academiae Cesarege Leopoldino-Caro- 

 linae Naturae Curiosorum,' the direction of which he retained, as 

 President of the Academy, imtil his death. In 1819 he became 

 Ordinary Professor of Natural History in the University of Bonn, 

 where he laboured assiduously, in conjunction with his scarcely 

 less celebrated brother, Theodor Friedrich Ludwig, in the esta- 

 blishment of an excellent botanic garden, and where his lectures 

 were in high repute, until 1831, when he was transferred to the 

 Botanical Chair of the University of Breslau. Professor Nees 

 von Esenbeck was not only one of the most laborious, but also 

 one of the most distinguished systematic botanists of the present 

 century. His principal botanical publications, besides those 

 already mentioned, are his ' Handbuch der Botanik,' in two vols. 

 8vo, Niirnberg, 1820-1 ; his ' Agrostologia Brasiliensis,' forming 

 the second volume of Professor Von Martius's intended ' Flora 

 Brasiliensis,' 8vo, 1829 ; his * Cyperaceae Brasilienses ; ' his ' Na- 

 turgeschichte der Europaischen Lebermoose,' four vols. 8vo, 

 1833-38 ; his ' Systema Laurinearum,' 8vo. 1836 ; the " Acan- 

 thaceae" of DeCandolle's ' Prodromus ; ' and his "Monograj)h of 

 the East Indian Solanece,^^ printed in the seventeenth volume of 

 our * Transactions.' Besides these, he assisted largely in several 

 important works, published by his brother and other writers, and 

 wrote numerous papers in the ' Nova Acta,' and elsewhere. It 

 is not, however, as a botanist only that he deserved weU of natural 

 history ; as an entomologist also he is well known by his extensive 

 series of researches on the family of Ichneumonidcs and their allies, 

 of which his ' Monographie der Ichneumoniden,' two vols. 8vo, 

 Stuttgard, 1828, and his ' Hymenopterorum Ichneumonibus Afii- 

 nium Monographiae,' two vols. Svo, Stuttgard, 1830, contain the 



