FUCALES (HETEROGENERATAE) 211 



merged. The fertile conceptacles, which only contain megaspor- 

 angia, cover the entire frond, but as microsporangia have never 

 been recorded the occurrence of meiosis is extremely doubtful, 

 although at present there is no cytological evidence available. Each 

 mature megasporangium, which contains eight eggs, is surrounded 

 by unbranched paraphyses. The genus is monotypic and contains 

 the one species, Notheia anomala^ which, in view of its habit, 

 structure and life history, must be regarded as a degenerate type. 



REFERENCES 



Sargassum. Borgesen, F. (19 14). Mindeskr. Steenstr. p. 3. 

 Fucus. Bower, F. O. (1880). Quart. J. Micr. Sci. 20, 36. 

 Hormosira. Getman, M. R. (1914). Bot. Gaz. 58, 264. 

 Himanthalia. Gibb, D. C. (1937). J. Linn. Soc. {Bot.) 51, 11. 

 Fucus, Pelvetia. Inoh, S. (1935). J- Fac. Sci. Hokkaido Univ. 4, 9. 

 Fucus. Nienburg, W. (193 i). Wiss. Meeresuntersuch., Abt. Kiel, 21, 51. 

 Fucus. Roe, M. L. (1916). Bot. Gaz. 61, 231. 

 Sargassum. Simons, E. B. (1906). Bot. Gaz. 41, 161. 

 Notheia. Williams, M. M. (1923). Proc. Linn. Soc. N.S.W. 48, 634. 



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