352 XI. DESMiDiACEiE (West). [Cosmarium 



PuNGO Andongo. — In stagnis prope Anbilla (Condo) ; March 1857. 



No. 177. 



Compare with C. polygonum v. minus Hieronymua. 



22. C. ellipsoideum Elfv. in Acta Soc. Fauna et flora Fenn. ii. 

 no. 2, 13, t. i f. 10 (1881). 



Var. minor Racib. in Pamietnik Akad. XJmiej. w Krakowie, 

 Wydz. Matem.-prz. x. (84), t. x. f. 9 (1885) ; W. et G. S. West, I.e. 



proteiforme W. B. Turn, in K. Sv. Vet.-Akad. Handl. Bd. 

 XXV. no. 5, 64, t. ix. f. 26 (1892). 



PuNGO Andongo. — In stagnis prope Anbilla (Condo) ; March 1857. 

 No. 177. 



23. C. submamilliferum W. et G. S. West in Journ. Bot. 1897, 

 p. 117, t. 368, f. 8. 



PuNGO Andongo. — In stagnis prope Anbilla (Condo) ; March 1857. 

 No. 177. 



This is distinguished from C. mamilliferum Nordst. in Vidensk. 

 Medd. Naturh. Foren. Kjoben. 1869, no. 14-15, 212, t. iii. f. 22 (1870) 

 by the very different form of the semi-cells in front view. 



24. C. meteoronotum W. et G. S. West in Journ. Bot. 1897, 

 p. 117, t. 367, f. 18. 



HuiLLA. — In uligiuosis editioribus prope Humpata, Empalanca et 

 Lopollo ; May 1860. No, 16. 



This differs from C. sexangulare Lund, (in Nova Acta R. Soc. Soient. 

 Ups. ser. 3, vol. 8, no. ii. 35, t. ii. f. 23) in its larger size, its relatively 

 greater length, and in its unequal hexagonal semi-cells. 



25. C. sulcatum Nordst. Alg. Sandvic. 13, t. i. f. 18 (1878); 

 W. et G. S. West, I.e., p. 118. 



PuNGO Andongo. — In stagnis prope Anbilla (Condo) ; March 1867. 

 No. 177. 



LiBONGO. — Ad margines flum. Lifune ; Sept. 1858. No. 204. 



26. C. heterochondrum Nordst. in Acta Univers. Lund. xvi. 

 J). 5, t. i. f. 3 (1880). 



Var. mediogemmatum W. et G. S. West in Journ. Bot. 1900, 

 p. 292. 



C. mediogemmatum W. et G. S. West in op. (At. 1897, p. 118, 

 t. 367, f. 11. 



PuNGO Andongo. — In stagnis prope Anbilla (Condo) : March 1857. 

 No. 177. 



The lateral angles of this plant are usually finely granulate. 



27. C. sinostegOS Sohaarschm. in Magyar. Tudom. Akad. Math. 

 Termeszett. Kozlemen. xviii. 266, tab. i. i. 12 (1883). 



Var. obtusius Gutw. in Sprawozd. Komisyi fizyographic, Akad. 

 Umiej. w. Krakowie, xxviii. pt. ii. 129, t. ii. f. 13 (1893) ; W. et 

 ■G. S. West in Trans. Linn. Soc. ser. 2, v. 58, t. vi. f. 33 (1895) ; 

 Journ. Bot. 1897, p. 118. 



Libongo.— Ad margines flum. Lifune ; Sept. 1858. No. 204. 



28. C. emarginatum W. et G. S. West in Trans. Linn. Soc. ser. 

 2, V. 58, t. viii. f. 14 (1895) ; Journ. Bot. 1897, p. 118. 



A large form with a narrower isthmus. 



