ALGOLOGICAL NOTES 



et similibus; verruca anterior! ( = polo anterior!) minuta et acuta; 

 chromatophora singula, magna, cellulam plerumque complente vel 

 in polum posteriorem non extensa, cum pyrenoicle singulo 

 conspicuo mediano vel subanterior! ; stigma carente. Propagatio : 

 cellula matricalis ad duas directiones oblique longitudinales in 

 quattuor dividit. 



Long. cell. 12-16 ^ ; lat. 9-11-5 /u ; long, ciliorum 19-21 ;u. 

 (Fig. 2.) 



Hah. Among Platymonas tetrathele in a sea-water tank the 

 contents of which came originally from Plymouth ; May, 1915. 

 This species of CJilamydomonas occurred in great quantity, and 

 is one of the few marine species of 

 the genus. The stout character of 

 the cells with symmetrically apicu- 

 late poles is a characteristic feature 

 of the organism. The chloroplast is 

 very massive and in many individuals 

 appears to fill the entire cell from 

 pole to pole. In other individuals 

 the posterior pole is colourless and 

 pellucid, the chloroplast being round- 

 ed off behind in a circular manner. 

 There is one large pyrenoid, either 

 median in position or disposed some- 

 what anteriorly. The chloroplast 

 contains numerous small granules, 

 and there is no stigma. The exten- 

 sion of the chloroplast to the extreme 

 anterior end of the cell, with the con- 

 sequent absence of a visible clear space in that region is somewhat 

 unusual in species of CJilamydomonas. 



Chi. hrachyura should be compared with Chi. caudata Wille 

 and Chi. s^ihcaudata Wille,''' from both of which it differs in the 

 shape of the cell-body, with symmetrical poles, in the nature of 

 its chloroplast, in the position of the pyrenoid, and in the absence 

 of a stigma. 



2. Chlamydomonas palatina Schmidle, " Bemerkungen zu 

 einigen Slisswasseralgen," Ber. Deutsch. Botan. Ges., xxi, 1903, 

 p. 352, t. 18, f. 6, 7. 



Long. cell. 14-5-24 ^ ; lat. cell. 12-18-5 fx ; long, ciliorum 

 23-31 /i. 



Hab. In a ditch at Harborne, Warwickshire (W. B. Grove, 

 1914). _ 



This species does not appear to have been definitely recorded 

 since its original description by Schmidle from ditches near Herx- 

 heim in Bavaria. The Harborne specimens agreed with those ori- 

 ginally described in size, in relative length of cilia, in the absence 

 of pyrenoids, in the absence of the stigma, and in the parietal, 



Fig. 2. — CJilamydomonas hra- 

 chyura. A-C, vegetative cells ; D, 

 division of mother-cell to form four 

 daughter-cells. All x 1000. 



* N. Wille, " Algologische Notizen IX- 

 videnskab., xli, Christiania, 1903. 



-XIV," Nyt Magazin f. Natur- 



