

MICR.\STFRIAS- 



201 



Cellulse H-plo latiores quarn longse (sine spinis) ; lobis laUralibus oblique snb- 

 truncatis, angulis superioribus rotundatis, angulis inferioribus spina minuta instructs 

 lobo polari late truncato, apice subreeto ; membrana irregulariter granulata ; a vertioe 

 visse paullo tuniidae ad medium utrobique. 



Long. 38"5/* ; lat. (sine spinis) 46^; lat. isthm. lC/x ; crass. 16/*. 

 Hub. — Mansang, near Hsipaw (No. 2-4193). 



The Burmese variety resembles var. Walhchiana Turn, more than typical J/, iwitn owing 1 

 the absence of the sjines from the superior angles of the lateral lobes. 



77. Micrasterias tropica Nordst. Desm. Brasil. 1570, p. 219, t. 2, f. 15. 



Forma cum granulis magnis 4 infra mannnem apiealcni lobi polnris ; spinicellula* 

 a vertice visae paullo robustioribus, lateribus subrectis. 



Long. Ill/*; lat. 98/*; lat. isthm. 17'5/* ; crass. 32/* (PI. xiv, fig. 23). 

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



78. Micrasterias Mobii (Borge) W. & G. S. West, Desm. Singapore 18i»7, p. 



162; Freshw. Chlorophy. Koh. Chang, 1901, p. 86, t. 3, f. 21. 



Euastrum verrucosum Ebrenb. var. Mobii Borge, Austral. Siisswasserchlor. 1896, 

 p. 13, t. 2, f. 18, 19. 





Var. Burmense var. n. (PI. xiv, figs. 19, 20). 

 Semicellulai variabiles, apice lobi polaris late et distinct© retuso ; lobis later li- 

 te majoribus et extensioribus, lobulis superioribus et inferioribus nductis (interdun, 

 psene obsoletis) rotundato-conicis ; cum tumore magno in centre semicellularum supra 

 isthmum et tumore minore intra lobum lateralem unumqurmquc Semiccllultt a vertice 

 visse polis plus attenuatis, umbone magno et lato ad medium utrobique, tumore multe 



inmore 



pclos versus utrobique. Ar.guli lobi polaris et loborum lateralum prandk mag 

 nitudinis variabilis (ssepe maximis) praeditis. 



Long. 119-123/*; lat. 98-101/*: lat. lob. polar. 73-79^; lat. isthm. 25-27 ^ ; 



crass. 55/x. 



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



This variety varies much in the argles (or processes) of the polar lobe which are sonieli^ 

 j.nib vanttjr vaxi TpifttivA depth of division of the lateral 



laterally produced, sometimes abruptly truueate, and also in relative depm 

 lobes. In some specimens tbe lateral lobes are almost enure and ,u other, the ^ , er 

 inferior lateral lobules arc short and rounded. The g™<**» ° { th ^* ° ^„ notdy 



lateral lobes also varies very much. It is distinguished ironi ^ typ.cd J MM, by >J> >* 



greater width across the base o£ ,be semiceUs, by "adl^ «*« ^ ^ of 



the more F rominent scrbbiculate tumour w lt hin each lateral lobe, and ny 



the vertical view. T T 



M . Mm var. |U. should be compared with *J^j~£ J£ Cever lZ 

 1902, p. 603, t. 40, f. 58) which it resen, b es more Omn th^T *■ I ^ ^ ^ 



reduced lateral lobules, aud in the replacement of the several smau 

 bv one much larger one. ... 



var. Ridleyt, a variety described from Singapore. 



Var. integrum var. n. (PL xiv, 21). 



A K N. Roy. Bot. Gard. Calcutta Vol. VI. 



