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THE 



JOURNAL 



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LINNEAN SOCIE 



(BOTANY.) 



A Review of the Grenus CUorocliytrium^ Cohn. By B. Muriel Bristol, M.Sc, 



(CommRnicated by Prof. G. S. Wkst, M.A., D.Sc.j F,L.S.) 



(Plates 1-3, and 1 Text-figure.) 

 [Reud 21st November, 1918.] 



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Introduction. 



WiLLE lias suid* that '^ there is no doubt that the subfamily Endospliseracese 

 consists of very nearly rehited forms/* How nearly related they are he 

 evidently did not realize, since he regarded Cldorocliytnum^ Cohn, CJiloro- 

 cystisj Reinh., Stomatochi/trmm, Cunningh., Endo splicer a^ Klebs, Scotino- 

 splicrra^ Klebs, and Centra splicvra^ Borzi, as independent genera, despite the 

 fact that the generic limitations were such that investigators of this group of 

 algre have frequently expressed themselves to be doubtful with which genus 

 they were working. In 1901, however. Prof. G. S. AVestt pointed out that 

 the differences between ChlorocJiytrium, Cohn (1874), and Stomatochytriumy 

 Cunningh. (1888), can scarcely be regarded as of generic importance, and 



submerged Cunningham's genus in that of Cohn, thus beginning a simplifi- 

 cation of the confusion existing among these alg^o. At a later date | he 

 went much further in stating that the distinctions which form the basis of 

 the separation of the so-called ^^ genera " Endosplmra, Klebs, Scot hio splicer a , 

 Klebs, and Chlorocystis^ Reinh., from the genus Chloroclajtriiun^ Cohn, are of 



* Wille, N. Die Natiirlichen Pflanzenfamilieu, I Abt. 2, p. 64 (1807). 



t West, G. S. ^British Freshwater Algfc.' Camb. BioL Series, p. 198 (1904). 



; West, G. S. ' Algre.' Camb. Bot. Handbooks, vol. i. (191G) p, 312. 



LINN. JOURN. — BOTANY, VOL. XLV. B 



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