IMMTISH 



Distribution. France. Germany. Austria 

 and G-alicia. Hungary and Bosnia. Italy. Spain. 

 Portugal. Norway. Sweden. Denmark. N.andS. 

 liiissia. Faeroes. Iceland. NovaZembla. Greenland. 

 Siberia. Japan. India (var.). Ceylon. Samoa. Aus- 

 tralia. W., Central, and E. Africa, Madagascar. 

 United States. W. Indies. Brazil. Argentina. Uruguay. 

 Patagonia, 



Cl. Leibleiniiis an abundant and somewhat variable species, 

 exhibiting a considerable range both with regard to its size 

 :i ml its curvature. The apices are often more or less suddenly 

 mil-rowed and almost subacuminate. Some of the American 

 specimens reach a much larger size than any met with in 

 Europe. The ventral inflation, which is one of its primary 

 characters, varies much in the degree of its prominence, and 

 the cell-wall occasionally becomes tinted. There 1 are, however, 

 too many intermediate states to discriminate with any degree 

 of accuracy between these several forms. 



It is distinguished from Cl. moniliferum by its greater 

 curvature, its much more attenuated apices, and its smaller 

 size. Perhaps CL moiiilifenim var. minns Kiitz. (= .CL 

 ornatum Eabenh.) is really a form of Cl. Leilli'iii!!. 



23. Closterium moniliferum (Bory) Elirenb. 

 (PI. XVI, figs. 15, 10.) 



Lnnulinn monilifera Bory, 1824. 



Closterium moniliferum (Bory) Ehronb. Infus. 1838, p. 91, t. 5, f. xvi (in 



part) Menegh. Synops. Desm. 1840, p. 232 ; Hass. Brit. Freshw. Alg. 



is I,-,, p. 370, t. 87, f. 2 ; Ealfs, Brit. Desm. 1848, p. 160, t. 28, f. 3 ; Kill /,. 



Spec. Algar. 1849, p. 103 ; N;ig. Gatt. einz. Alg. 1849, p. 106, t. G, C, f . 1 ; 



Arch, in "Pritch. Infus. 1861, p. 748 ; Eabenh. Flor. Europ. Algar. Ill, 



JS6S, p. 131; Lund. Desm. Suec. 1S71, p. 80, t. 5, f . 14; Wolle, iN-sm. 



U S. 1884, p. 45, t. 7, f. 15 ; Cooke, Brit. Desm. 1886, p. 24, t. 12, f. 3 ; 



Hansg. Prodr. Algcnfl. Bohm. 1888, p. 182, f. 108 ; DC Toni, Syll. Alg. 



1889, p. 845 ; Eoy & Biss. Scott. Dosin. 1894, p. 240 ; Nordst. Index 



Desm. 1890, p. 173 ; West X <J. S. West, Alg. S. England. 1897, p. 481 ; 



Alga-fl. Yorks. 190O, p. 50; Alg. N. Ireland, 1902, p. 23. 

 Cl. moniliferum a. genii'tHinn Kirehn. Alg. Schles. 1878, p. 141. 

 Cl. moniliferum a. typicum TClebs, Desm. Ostprcuss. 1879, p. 9, t, 1, f. S/,. 

 Cl. LeiUeinii Kiitz. var. curium West, Desm. Mass. 1889, p. 17, t, 2, f. 8. 

 Arthrodia monilifera Kuntze, Eovis. gen. plant. 1891, p. 8S3. 

 ? Closterium galiciense Gutw. Nonn. Alg. Nov. 1896, p. 39, t. 2, f. 18. 



Cells of medium size, stout, 6-8 times longer than 

 Ilicir diameter, moderately curved, outer margin 

 100-~no of arc, inner margin with a distinct inflation 



