ALGOLOGICAL NOTES 



81 



Further comment upon this species has been rendered necessary 

 owing to a statement made by Professor Chodat in 1902. In his 

 Algues Vertes de la Suisse, on p. 207, one 

 finds : " II est difficile de se faire une idee 

 exacte de la place -de cette plante dans le 

 systeme. Les descriptions de West sont le 

 plus souvent trop succintes et ne sont presque 

 jamais accompagnees d'une etude de revolu- 

 tion. Est-ce un genre nouveau? " He also 

 quotes as a reference '' Staurogenia emargi- 

 nata West, Freshwater Alg. of Madagascar 

 in Transact, of the Linn. Soc. of Lond. ii. 

 Ser. Bot. vol. v. p. 3." It seems reasonable 

 to suppose from these remarks, taken in 

 conjunction with his erroneous reference, 

 that Professor Chodat had not seen either 

 the published description or the figures of 

 Fig.l.— A. Tetraedron this Alga, and his comment is not only un- 

 enorme (Ealfs) Hansg., j^gt, but scarcely in agreement with fact." 

 x500. BandC. Cruci. The formation of autospores was shown 

 ge7iia emarginata ( W. &.., • • i n • ^ i-iii 



G. S. West) Chodat, m the origmal figures m a way which clearly 

 X 520. indicates not only the correct systematic 



position of the Alga, but also that there is 

 only one genus for its reception, viz. Crucigenia Morren, 1830 

 (= Staurogenia Kiitz., 1849). 



It is not necessary to describe the Alga again, as there is 

 nothing to add to the original description, but I give a copy of 

 the original figure for the benefit of those who do not appear to 

 have consulted the one first published (in 1895). Consult fig. 1, 

 B and C. 



Moreover, this Alga, which is one of the most remarkable 

 species of the genus, is only known to occur in Madagascar. Yet 

 one finds it, without any comment upon its distribution, in a work 

 on the Green Algce of Sioitzerland ! From the latter publication 

 it has, of course, been copied into Migula's Kryi^togamenflora von 

 Deutschlajid, Oesterreich, mid der Schweiz, Bd. 5, 1907, p. 661. 



8. CcELASTRUM ROBUSTUM Hantzsch var. confertum W. & 

 G. S. West, " Welw. Afric. Freshw. Alg.," Journ. Bot. June, 1897, 

 p. 236. Diam. cell. 7-8 n ; diam. colon. 35-38 fi. 



Hah. Albert Nyanza. 



It is doubtful if Ccelastrum rohtistum is not merely a thick- 

 walled form of C. microponmi, but the point requires further 

 investigation. 



9. Ccelastrum cambricum Arch. var. Stuhlmanni (Schmidle) 

 Ostenfeld in Bull. Mus. Comp. Zool. Harvard Coll, lii. 1909, 



• Remarks in the same volume, accompanied by equally erroneous refer- 

 ences, concerning Tetraedron pentaedricinn (which Chodat refers to as '* Tetra- 

 pedia pentraedrica'") and Tetrapedia morsa (pp. 219, 220, 222, 223) all indicate 

 that he was unacquainted with the published descriptions and figures of these 

 Algae. His remarks are based entirely upon misconceptions. 



