COSMARIUM. 199 



184. Cosmarium margaritiferum Menegh. 

 (PL LXXXIII, figs. 4-11.) 



r Ursinella margaritifera Turpiii in Diet. sci. nat. planch, bot. veg. acotyl. 



Paris, 1820, f. 23 [figures unrecognizable] ; Aperc,u organograph. 1828, 



p. 316, t. 13, f. 19 [Quid ?] ; Kuntze, Eevis. gen. plant. 1891, p. 923. 

 Helierella ? margaritifera Meyeii in Isis, 1830, p. 163. 

 Euastrum margaritiferum Ehreiib. Organisation in der Eichtung des 



kleinsten Eaumes. Berlin, 1834, pp. 246, 320 ; Kiitz. Phyc. germ. 1845, 



p. 136 ; Focke, Phys. Stud. 1847, pp. 42, 64, t. 1, f. 6 (?), t. 2, f. 17 (?), 



19 (:-), 20 (?), 21 (:-) ; Nag. Gatt. einz. Alg. 1849, p. 119. 

 Micmsterias margaritifera Breb. in Mem. Soc. acad. sci. arts et bell, lettr. 



de Falaise, 1835, p. 55. 

 Cosmarium margaritiferum Menegh. Synops. Desm. 1840, p. 219; Ealfs in 



Ann. Mag. Nat. Hist. 1844, p. 393, t." 11, f. 4; Hass. Brit, Freshw. Alg. 



1845, p. 362, t. 81, f . 1 [figure very bad] ; Ealfs, Brit. Desm. LS4S, p. 



100, t. 16, 2d [b and c :- ; not 2 a] ; Kiitz. Spec. Alg. 1849, p. 176 ; De 



Bary, Conj. 1858, pp. 47, 72 ; Arch, in Pritch. Infus. 1861, p. 733, t. 1, 



f . 1 Arch, in Quart. Journ. Micr. Sci. vi, 1866, p. 274 ; Eabenh. Flor. 



Europ. Alg. 1868, III, p. 157 ; Nordst, Desm. Brasil. 1870, p. 207 ; 



Kirchn. Alg. Schles. 1878, p. 150; Gray, Monogr. loc. Conj. 1884, p. 64 ; 



> Wolle, Desm. U. S. 1884, p. 74, t. 13, f. 1-3 [figures very inaccurate] ; 



Boldt, Siber. Chlorophy. 1885, p. 107 ; Cooke' Brit, Desm. 1877, p. 102, 



t. 39, f . 2 "figures bad] ; Hansg. Prodr. Algenfi. Bohm. 1888, p. 198 ; 



Boldt, Desm. Groiiland, 1888, p. 26 ; De Toni, Syll. Alg. 1889, p. 979 ; 



West, Alg. X. Wales, 1890, p. 289 ; Heimerl, Desm. alp. 1891, p. 595 ; 



West, Alg. W. Ireland, 1892, p. 152 ; Alg. Engl. Lake Distr. 1892, 



p. 726; Liitkem. Desm. Attersees, 1893, p. 556; Eoy. & Biss. Scott. 



Desm. 1894, p. 167; Nordst. Index Desm. 1896, p. 165; West , & G. S. 



West, Alg. S. England, 1897, p. 488 ; Schmidle, Lappmark Siisswasser- 



algen, 1898, p. 33 ; G. S. West, Alga-fl. Cambr. 1899, p. 217 ; West A: 



G. S. West, Alga-fl. Yorks. 1900, p. 71; Borg. Freshw. Alg. Faroe's, 



1901, p. 228 ; Alg. X. Ireland, 1902, p. 37 ; Larseii, Freshw. Alg. E. 



Greenland, 1904, p. 86 ; West & G. S. West, Freshw. Alg. Orkneys and 



Shetlands, 1905, p. 19; Further Contrib. Freshw. Plankton Scott. 



Lochs, 1905, p. 484 ; Coinp. Study Plankton Irish Lakes, 1906, p. 85 ; 



Borge, Beitriige Alg. Schweden, 1906, p. 31. 

 Didymidium (Cosmarium) margaritiferum Eeinsch, Algenfl. Franken, 



1867, p. 118. 



Cosmarium margaritiferum a, genuinum Kirchn. Alg. Schles. 1878, p. 151. 

 ? C. prxmorsum Breb. c. germanicum Eacib. Desm. Nowe, 1889, p. 89, t. 5, 



f. 39. 

 ? ? C. subtholiforme Eacib. var. Malinvemianum Eacib. 1. c. t. 5, f. 40 ^C. 



Mo.linrernianum Schmidle, 1894]. 

 C. confusum Cooke var. regularius (as understood by West) Alg. T\ . 



Ireland, 1892, p. 156 ; Alg. Engl. Lake Distr. 1892, p. 728 ; West & 



G. S. West, Some New and Int. Freshw. Alg. 1896, p. 156, t. 4, f. 41 ; 



Alg. S. England, 1897, p. 490 ; Alga-fl. Yorks. 1900, p. 75. 

 C. co'nfusum Cooke subsp. ambiguum West, Alg. W. Ireland, 1892, p. 156, 



t. 21, f. 13 "figures imperfect" ; Alg. Engl. Lake Distr. 1892, p. 728 ; 



West & G. S. West, Alg. S. England, 1897, p. 490. 

 C. MaUnvernianum (Eacib.) Schmidle var. Badense Schmidle, Chlorophy. - 



fl. Torfstiche Yirnheim, 1894. p. 5S, t. 7, f. 21 ; West & G. S. West, 



Alga-fl. Yorks. 1900, p. 75; Alg. X. Ireland, 1902, p. 40; Scott. 



Freshw. Plankton, I, 1903, p. 527. 



Cells rather under medium size, slightly longer 



