320 A CENTURY OF PROGRESS IN THE NATURAL SCIENCES 



Manton, I. 



1932. Contributions to the cytology of apospory in ferns. Journ. Genet., 25:423-43^, 

 1950. Problems of Cytology and Evolution in the Pteridophyta. Cambridge. 



MooRE, T. 



1857. Index Filicum. London. 



•Olutsr, F. W., and D. H. Scott 



1905. On the structure of the palaeozoic seed, Lagenostoma Lomaxi, with a statement 

 of the evidence upon which it is referred to Lyginodendron. Philos. Trans, 

 Roy. Soc. London, ser. B, Vol. 197. 



PRESL, C. B. 



1836. Tentamen Pteridographiae. Prague. 



Renault, B. 



1870. See Renault and Zeiller, 1873. 

 1881-1885. Cours de botanique fossile. Paris. 



Renault, B., and R. Zeiller 



1873. Recherches sur I'organisation des Sphenophyllum et des Annularia. Ann. Sci. 

 Nat., ser. 5, 18:5 et seq. 



Sachs, J. 



1868. Lehrbuch der Botanik (2nd ed., 1882.) Leipzig. 



SCHOTT, H. 



1834. Genera Filicum. Vindobonae. 



SCHOUTE, J. C. 



1902. Die Stelar-Theorie. Groningen. 



1938. Chapters on "Anatomy" and "Morphology" in Verdoorn, Manual of Pteridology. 



SCOTT, D. H. 



1897-1899. On the structure and affinities of fossil plants from the Palaeozoic rocks. 

 Pts. 1-3. Philos. Trans. Roy. Soc. London, ser. B, Vols. 189-191. 



1900. Studies in fossil botany. 2nd ed., 1908 ; 3rd ed., 1920. London. 



Seward, A. C. 



1899-1919. Fossil Plants. 4 vols. Cambridge. 



Smith, J. E. 



1875. History of Ferns. London. 



Solms-Lauuach, H. 



1887. Einleitung in die Palaophytologie von botanischen Standpunkt aus. Leipzig. 

 1891. Introduction to Fossil Botany. Oxford, 



Stockmanns, F. 



1940. Vegetaux Eodevonien de la Belgique. M^m. Mus. Hist. Nat. Belg., No. 93. 



Stokey, a. 



1951. Contributions by the gametophyte to classification of the homosporous ferns. 

 Phytomorph., 1:39-58. 



Strasbubger, E. 



1884. The periodic reduction in the number of chromosomes in the life history of 

 living organisms. Ann. Bot. London, 8:281-316. 



