An Investigation of a Species of Saprolegnia. 3 19 
Full details of the methods of culture by which these various 
forms were obtained are given in the body of the paper, together 
with a full analysis of the genera based upon the methods of 
asexual reproduction that previous workers have established. 
Botanical Laboratory, 
University of Bristol. 
June, 1910. 
REFERENCES. 
1. Cornu, 1872. “Monographic des Saprolegniees.” Ann. des Sci. Nat. 
Bot. ser. 5, tome XV. 
2. De Bary, 1888. “ Species der Saprolegnieen.” Bot. Zeitung, IX. 
3. Hartog, M. M., 1895. “Cytology of the Vegetative and Reproductive 
Organs of the Saprolegniaceaz.” Trans. Roy. Irish 
Acad., Vol. 30, p. 649. 
4. Hartog, M. M., 18S8. “ Recent Researches on the Saprolegnieae ; a 
critical abstract of Rothert's results.” Ann. Bot. 
II, p. 203. 
5. Humphrey. 1893. “ Saprolegniacea: of the United States.” Trans. Amer. 
Phil. Soc., XVII. 
6. Kauffman, C. H., 1908. “Variation in Sexual Organs of the Sapro- 
legniacea;.” Ann. Bot. 22, pp. 361-388. 
7. Rothert, W., 1903. “ Die Sporenentwickldng bei Aphanomyces.” Flora, 
1903, XCII, p. 293. 
8. Rothert, W., 1890. “ Die Entwickelung der Sporangien bei der Sapro- 
lcgnieen.” Cohns Beitriigc zur Biologie der 
Pflanzen, Vol. V, pt. II. 
For explanations of the Figures on Plates I. and II. see the text. 
