COSMAlilL'M. 91 



Siber. Chlorophy. 1885, p. 103; Cooke, Brit. Desm. 1886, p. 93, t. 37. 

 f. 11; Hansg. Prodr. Algenfl. Buhm. 1888, p. 194; De Toni, Syll A.1--- 

 1889, p. 937; West, Alg. X. Yorks. 1889, p. 292; Alg. X. Wales, 1890, 

 p. 2S9 ; Heinieii, Desm. alp. 1891, p. 599 ; West, Alg. W. Ireland, 1892, 

 p. 148; Alg. Engi. Lake Distr. 1892, p. 726, t. 9, f. 14; Lutkem. Desm. 

 Attersees, 1893, p. 550; Boy fc Biss. Scott. Desm. 1894, p. 168; Xordst 

 Index Desm. 1896, p. 167 ; West & G. S. West, Alg. S. England, 1897, 

 p. 487 ; Wehv. Afric. Freshw. Alg-. 1897, p. 119 ; Schmidle* Lappmark 

 Siisswasseralgeii, 1898, p. 27 ; G. S. West, Alga-fl. Cambr. 1899, p. 216 ; 

 Lutkem. Desm. Millstattersees, 1900, p. 9 ; West & G. S. West, Alga-fl. 

 Yorks. 1900, p. 93 ; Borge, Susswasseralgen Siid-Patagon. 1901, p. 25 ; 

 West & G. S. West, Alg. X". Ireland, 1902, p. 35 ; Freshw. Alg. Ceylon, 

 1902, p. 166 ; Borge, Alg. erst. Eegnell. Exped., II. Desniid. 1903, p. 98 ; 

 Larsen, Freshw. Alg. E. Greenland, 1904, p. 86; West & G. S. West, 

 Freshw. Alg. Orkneys and Shetlands, 1905, p. 22 ; Borge, Alg. Argentina 

 u. Boliv. 1906, p. 7. 



Didi/midium (Cosmarium) Braunii Eeinsch, Algenfl. Frank. 1867, p. 115, 

 t. 10, f. 3 [in part; a ? and d ( = "Ay Meneghinii" Eeinsch, 1. c. 

 p. 115)]. 



Cosmarium Meneghinii forma vulgaris Jacobs. Desm. Danem. 1876, p. 197; 

 Anderss. Sverig. Chlor. 1890, p. 16; Borg. Freshw. Alg. Faeroes, 1901, 

 p. 224. 



C. Meneghinii a. genuinum Kirchn. Alg. Schles. 1878, p. 148 ; Hansg. 

 Prodr. Algenfl. Bohui. 1888, p. 195 ; Gutw. Flor. glonow Galic. II, 1890, 

 p. 11 ; Flor. Glon. Okolic Tariiapola, 1894, p. 85. * 



Enastrum (Cosmarium) MenegJiinii (Breb.) Gay, Monogr. loc. Conj. 1884, 

 p. 58. 



Ui-sinella Meneghinii Kuntze, Eevis. gen. plant. 1891, p. 925. 



Cells small, suboctanerular. almost 1-J- times as lono- 



O -" t O 



as broad, deeply constricted, sinus narrow and linear ; 

 semicells transversely rectangular in the lower part 

 and pyramidate-truncate in the upper part, lower 

 parts of sides parallel and slightly retuse, upper parts 

 of sides strongly convergent and retuse, apex widely 

 retuse, all the angles somewhat rounded. Side view 

 of semicell broadly elliptic or subcircular. Vertical 

 view elliptic, ratio of axes about 1 : 1'5. Cell-wall 

 smooth. Chloroplasts axile, one in each semicell, with 

 a central pyrenoid. 



Zygospore globose, furnished with short acute or 

 subacute spines (often slightly curved), from 11-18 of 

 which show at the periphery. 



Length 12*5-24 ju; breadth 9'5-17/x; breadth of 

 isthmus 3-6 p.; thickness 6-10'5/x; diam. zygosp. 

 without spines 18-26 /x ; with spines 30-37 /i. 



EXGLAXD. Cumberland ! Westmoreland ! Lan- 

 cashire ! TT., X., and E. Yorks! Cheshire (//<>//). 

 Leicestershire #o/. Lincolnshire! Essex! Cam- 



