250 



F 



» 



»> 



»> 



»» 



>» 



FKESH-WATEB ALGM FBOM BURMA 



19-21. Burkillia cornuta gen. et sp. n. x520. 19, colony showing disposition of horned 



cells ; 

 gonidia (g). 



22. Tetraedron bifu 



27- 



20, three cells from a dissociated oolony showing esoape of 



•motile 



Wille) Lagerh. forma. x520. 



23-25. Ankistrodesmus quaternatus sp, 



n. x 520. 



26. Scenedesmus inerassatulus Bohlin 



x520. 



Nostoc humifi 



Carm. var. fluitans var. n. 27, colonies, natural size; 28, small 



part of colony, x 520, 



29-32. Ilapalosiph 



WelwiUchii W. & G. S, West. x520. 



heterocyst ; sp, spore 





PLATE XIII. 



%. 



55 



55 



55 



55 



55 



5* 



55 



55 



55 



55 



55 



55 



55 



55 



55 



w 



55 



1. Cylindrocystis diplospora Lund. var. mq/br West. x520. 



2. Pi 



6. 



15. 



17. 



18. 



19. 



20. 



Gfrew Lund, forma, elongate x520. 



3-4. Cylindrocystis pyramidata W. & G. S. West. x520. 4, zygospore 

 5. Olosterium pulchellum W. & G. S. West var. Burmense var. n. X 



520 



» 



Leibleinii K 



var. recurvatum var. n. X520. 



7. Cosmarium turgidum Breb. var. ligatum var. n. x520. 

 8-9. Pleurotaenium ovatum Nordst. var. tumidum Maskell. X520. 



10. 

 11. 



Cuyabense Borge forma inornata. X 520. 

 cristatum (Turn.) Borge. x520. 



12, Ct 

 13. 



viride ( Corda ) Jo 



var. truncatum var. n. x520 # 





» 



blatereundatum W. & G. S. West fo 



x520. 





11. Penium cucurbitinum Biss. var. subpolymorphum Nordst. forma. X 520. 



51 



adelochondrum Elf v. forma. x520. 



16. Olosterium incurvum Breb. x520. 



55 



55 



v 



55 



Venus Kutz. var. x520. 



didymotocum Corda. Small form, x520. 



substrigosum sp. n. x520. 



decorum Breb. forma minor. x520. 







PLATE XIV. 



Pig. 



55 



55 



55 



55 



55 



55 



51 



55 



51 



55 



5^ 



"55 



55 



55 



5) 



55 



55 



J5 



1. Cosmarium contractum Kirchn. forma. x520. 



2. Euastrum serratum Joshua, 550. This drawing was made from one of Joshua's 



original Burmese specimens. 



3. Euastrum asperum Borge. x520. 



4. 

 5. 



6. 



7. 

 8. 



9. 

 10. 



13. 



14. 



15. 



16-17. 



19-20. 

 21. 



55 



55 



55 



55 



55 



55 



55 



valtdum W. & G, S. West, forma. x520. 

 Bhamense sp. n. X 520. 

 dubium Nag. var. tritum var. n. x520. 



pulcherrimum W. & G, 8. West var. divisum var. n. x520. 

 coralloides Joshua var. subintegrum var. n. x 520. 

 serratum Joshua forma. x520. 

 inermius (Nordst.) Turn. var. Burmense var. n. x520. 



11. Euastridium Prainii gen. et sp. n. x520. 



12. Cosmarium Prainii sp. n. x 520. 



55 



55 



55 



55 



Burkillii sp. n. x520. 



55 



var. rectangulare var. n. x520 



Mansangense sp. n. x520. 

 glaphyronotum sp. n. x520. 



18. Micrasterias incisa Breb. var. Ma 



var. n. x 520. 



55 



55 



Mbbii (Borge) W. & G. S. West var. Burmense var. n. x520. 



55 



var. integrum var. n. x520. 



