804 AUTHORITIES QUOTED. 
Norpst. Bot. Not. Botaniska Notiser. Edited by C. F. O. 
Nordstedt. 8vo.,13 vols. Lund, 1871-1884. 
Perty Ku. Lesensr. Zur Kenntniss Kleinster Lebensformen 
in der Schweiz, Dr. Maximilian Perty. Folio, 17 plates. 
Berne, 1848. 
Petit Buuu. Soc. Bor. Fr. Sur les Spirogyra, par Paul 
Petit, in Bulletin de la Societe Botanique de France. 
Vol. xxi. Paris. 
Petit Spirogyra. Spirogyra des Environs de Paris, par Paul 
Petit. Roy. 80., 12 pl. Paris, 1880. 
Prinesu. Berrr. Beitrage zur Morphologie und Systematik 
der Algen, von Dr. N. Pringsheim, in Pringsheim 
Jahrbucher. Vols.i., ii. Berlin, 1858, 1860. 
PrinesH. Janne. Jahrbucher fur Wissenschaftliche Botanik, 
von Dr. N. Pringsheim. 80., 13 vols. Berlin, 
1858-1884. 
Pritcs. Inrus. A History of Infusoria, including the 
Desmidiaceee and Diatomacee, by Andrew Pritchard. 
80., 1 vol., with 40 plates. 4th Edition. London, 
1861. ‘ 
Port. Mipu, Fu. A Botanical description of British Plants 
in the Midland Counties. 2 vols. and supp. Stratford- 
on-Avon, 1817. 
Rasa. Auc. Exs. Algen Europa Exsiccati (dried specimens), 
Dr. Ludw. Rabenhorst. Dresden, 1850-1867. 
Rasz. Auc. Eur. Flora Europea Algarum Aque dulcis et 
submarine. lL. Rabenhorst. 3 vols., 80. Leipzig, 
1864. 
Rasy. Hepw. Hedwigia, Ein Notizblat far Kryptogamische 
Studien. Edited by Dr. L. Rabenhorst. 20 vols. 
Leipzig, 1852-1882. 
Rasa. Krypr Fu. Sacus. Kryptogamen Flora von Sachsen, 
by Dr. L. Rabenhorst. Vol. i. Algen. Leipzig, 1863. 
Rars. Desm. The British Desmidiee, by John Ralfs. 1 vol., 
Roy. 80., with 35 plates. London, 1848. 
Ray Syn. Johannis Raii Synopsis Methodica Stirpium Britan- 
nicarum. 80. 8rd Edition. London, 1724. 
Reiyscno Ancenrtora. Algenflora von Mittel-Franken. F, 
Reinsch. 80.,13 pl. Niirnburg, 1867. 
Reinscn Conteris. ap Aue. Contributiones ad Algologiam 
et Fungologiam, auct. P. F. Reinsch. Vol. i. 4o., 
pl. 181. Nuremberg, 1874. 
Retaan Cant. Flora Cantabrigiensis, auct. Richardi Relhan, 
a A.M. 80., 3 edition. Cambridge, 1820. 
Rostar. & Wor. Ueber Botrydium granulatum, von J. 
Rostafinski u. M.Woronin. 4o., 5 pl. Leipzig, 1877. 
Rota Car. Catalecta Botanica, ab A. G. Roth. 3 vols., 80. 
Leipzig, 1797. 
