COSMABIUM. 189 



Geogr. Distribution.- -Germany (var.). G-alicia in 

 Austria. Sweden. Bornliolm. Denmark. N". Russia. 

 Spitzbergen. United States. Argentina (var.). 



C. Quasillus lias something of the general habit and 

 appearance of C. Turpinii } but differs in its relatively greater 

 width, in its undulate margins, in the arrangement of its 

 granules, and in the form of the central protuberance. 



178. Cosmarium Turpinii Breb. 

 (PI. LXXXII, figs. 16, 17; PI. LXXXIII, fig. 1.) 



Cosmarium Turpinii Breb. Liste Desm. 1856, p. 127, t. 1, f. 11 [description 

 and figure poor and imperfect] ; Arch, in Pritcli. Infus. 1861, p. 733 ; 

 Eabenh. Flor. Europ. Algar. Ill, 1868, p. 172; Lund. Desm. Suec. 1871, 

 p. 29, t. 3, f. 9 ; Delp. Desm. subalp. 1877, p. 23, t. 8, f. 40-43 ; Boldt, 

 Siber. Chlorophy. 1885, p. 105 : Cooke, Brit. Desm. 1887, p. 106 ; Nordst. 

 Boriih. Desm. 1888, p. 193 ; De Toni, Syll. Alg. 1889, p. 1019 ; Borge, 

 Biclr. Siber. Chlor. 1891, p. 13 ; Nordst. Index Desm. 1896, p. 265 ; West 

 & G. S. West, Alg. S. England, 1897, p. 490; Some Desni. U. S. 1898, 

 p. 307 ; Alga-fl. Yorks. 1900, p. 76 ; Alg. K Ireland, 1902, p. 39 ; 

 Larsen, Freshw. Alg. E. Greenland, 1904, p. 90 ; West & G. S. West, 

 Freshw. Alg. Orkneys and Shetlands, 1905, p. 20; Conip. Study 

 Plankton Irish Lakes, 1906, p. 85 ; Borge, Beitrage Alg. Sell we den, 

 1906, p. 40. 



C. Turpi/ili Breb. var. Lundellii G-utw. in Spraw. Kom. fizyj. Akad. 

 Umiej. Krakow, 1884, p. 133 ; Eacib. K"onn. Desm. Polon. 1885, p. 74 

 [b. Lundellii 1. genuina^ ; Gutw. Wahr. d. Prioritat, 1890, p. 71 ; West, 

 Add. Alg. W. Yorks. II," 1891, p. 246; Gutw. Flor. Glon. Okolic Lwowa, 

 1891, p. 62, t. 3, f. 1 ; West, Alg. W. Ireland, 1892, p. 155 ; Alg. Engl. 

 Lake District, 1892, p. 727 ; Eoy & Biss. Scott. Desm. 1894, p. 177. 



C. Turpinii Breb. a. Brebissonii Eacib. in Spraw. Kom. fizyj. Akad. Umiej. 

 Krakow, 1884, p. 11 (sep.). 



C. Turpinii Breb. forma gallic a Boldt, Desm. Gronland, 1888, p. 24. 



Ursinella Turpinii Kuntze, Eevis. gen. plant. 1891, p. 926. 



Cosmarium Botrytis (Bory) Menegh. var. emarginato-constrictum Lenim. 

 Klebahn & Lemm. Vorarbeit. Flor. Plon. Seengebeites, 1895, p. 57 

 (c. fig. 10). 



C. emarginato-constrictum Lemni. Z welter Beitr. Algenfl. Ploner Seen. 

 1896, p. 171. 



Cells of medium size, a little longer than broad, 

 very deeply constricted, sinus narrowly linear with a 

 slightly dilated extremity, somewhat open outwards ; 

 semicells pyramidate-trapeziform, rapidly narrowed 

 from a broad base, basal angles rounded, sides very 

 slightly concave (more especially in the upper part), 

 apical angles obtuse, apex very slightly retuse ; cell- 

 wall densely granulate, granules irregularly disposed, 

 36-40 visible at the margin, slightly reduced in size 



