XANTHIDIUM. 



209 



113. Cosmarium subcostatum Nordst. Desm. ltal. 1876, p. 37, t. 12, {. 13. 

 Long. 31/i ; lat. 26/*; lat. isthm. 8*2^. 

 Hah.— In the Kan-gyi at Mudon (No. 24">05). 



Forma. ( as ? (7. subcrenatum Hantzsch var. divaricatum Wille, Fer^ko. Alg. Nor 

 Semlj. 1879, p. 40, t. 12, f. 27). 



Long. 24/*; lat. 20//,; lat. isthm. 6'8/i. 



Hab. — Singaing, in the Kyaukse district (No. 22193). 



Forma minor W. & G. S. West, Alg. Central Africa, 1896, p. 379, t. 361, f. 15. 



flab. — l n flood rice-fields, Burdwan (No. 24674). 



114. Cosmarium subalatum W. & G. S. West, Alg. Madag. 1895, p. 63, t. 7, f. 31. 



Pyrenoidibus singulis ; apicibus minus undulatis. 

 Long. 18—21/*; 15*5 — 19/*; lat. isthm. 4— 4*8/*. 

 flab— In springs on the river bank, Bhamo (No. 001). Manaang, near Hsiptw 



(No. 24193). 





115. Cosmarium tesselatum (Delp.) Nordst. Alg. et Char, i, 1880, p. 7. 



Dysphinctium tessellatum Delp. Desm. subalp. 1877, p. 136, t. 21, f. 10-13 

 Long. 115-120/*; lat. 63-5-67/*; lat. isthm. 54m. 



Bab.— Mansang, near Hsipaw (No. 24193). 



116. Cosmarium Mansangense sp. n. (PI. xiv, fig. 15). 



C. subparvum, circiter 2J-plo longius quam latum, levit.r constrictum, sinu parr 

 srato- seniicelluhe cylindrico-oblongse, lateribus rectis, angulis basalibtis ' 



datis, apice late rotunda to ( 



itte circulares : nn*mbran:i ijranulat.i 



gr 



in seriebus veiticaiibus (cum iis marginibus visis 11) ordinatis, ct in ambitu 



toto semicellulse granulis circiter 26. 



Long. 61/*; lat. 24/*; lat. isthm. 18/*. 

 Ha b. -Mansang, near Hsipaw (No. 24193) 



This species stands nearest to C. **b. *» ***-■ £+*»" *l "!T 



wlo* it is distinguished by the paraUel sides of the aennceUa, h y b™d.y ronnded ap,^ and ,h. 



more 



It should also be compared with G. pseudammum Wille (Sydame 



1884, p. 18, t 



1, f. 37). 



Genus: Xanthidium Ehrenb. 



117. Xanthidium spinosum (Josh.) nob 



Cosmarium spinosum 



Josh 



Burm. Desm. 1886, p. 647, t. 25, f. 9, 4 



give 



We have examined a number of Joshua's original specimens of this Desmid and 

 we nave exaimueu. The following is an amended 



an accurate figure of one of them (Fl. xv, ng. i/ 



description of the species:- constrictum, 



X. submediocre, paullo ^"^ angulia 



sinu aperto apicem versus angusto , semiceuuiw F 



Ank. Roy. Bot. Garp. Calcutta Vol. VI 



