220 



FRESH-WATER ALG^E FROM BURMA, 



This tiny species is 



jterized by 



minutely serrato 



processes, which are horizontal 



in 



the 



view, but 



sposed 



in 



om 



the apex 



semicell 



triangular, with three straight processes 



one margin 



of each process being a direct continuation 



one of 

 It is 



. th 

 'hapi 



ree 6iues. 



8 nearest to St. tenumimum W. & a. S. West (Alg. Madag. 1895, p. 78, 6. 8, 



f. 43), but is distinguished 



the horizontal position of the processes in the front view, by their 



oblique arran 



in 



he vertical view, and 



the more minute crenulation of their margins 



150, Staurabtkum bicoronatum 



Johnson, Rare Desin. U. S. i, 1894, p. 290, t t 



211, f. 9. 



Forma processibus 



paullo longioribus 



et angustioribus 



Long. 

 llab. 



18-19/a; lat. cum proc. 27-32/* 



lat. isthm. 6'7/a 



Mansang 



oar Haipaw (No. 24193) 



151. Staurastrum parallelum sp. n. 



St 



pervum 



circiter 2 — 2|-plo latius quam 



longum (cum processibus), leviter 



ictum 



semicellukc subquadratse, angulis basalibus 



levissime rotundatis 



gulis 



Buperioribus in pr 



longos 



rectos horizontaliter dispositos productis, marginibus 



ato-dentatis, apicibus processuum tridenticulatis, apice 



retuso : a vertice visa? 



processuum 



ato et late 



angulis in 



magna tru 



lorum 10 circa basin semicellularum. 



semi 



elev- 



ulare 



laterib 



leviter concavi 



j 



processus longos productis 



ginibus 



processuum denticulatis, cum verruca 



emarginata intra marginem 1 



unu 



mquemque 



an 



nulo 



g 



Long. 17/*; lat 



sine proc 



7'6^, cum proc. 32'5-37yu 



lat 



sthm 



5*5/x 



J lab. 

 This 



Maniang, near 



Hsipaw (No. 24193). 



Staurastrum is characterized by the elevated apex of the semicells, by the horizontally 



disposed, serrate- dentate processes, and 



the ring of granules round the base of the semicells 



It 



does 



appear to be very closely related to any other described species. 





152. Staurastrum sibindentatum sp. n. (PI. xv 



y 



figs. 



St 



ubparvum 



dupl 



lat 



quam Ion gum ( 



const rictum 



21, 22). 

 processibus), subprofunde 



semicellulse quadrato-trapeziformes, verruca bigranulata ad basin utrobiq 



incisura subprofunda et aperta supra verrucam bigranulatam 



processus 



longos 



levissime et 



gra 



incurvatos productis 



minute et acute nodulosis, apicibus processuum tride 



angulis superioribus 



* 



marginibus 



in 



processuum 



spinis parvis 4-5 praedito (spinis ssepe geminatis) ; a vertice visa* biradiatse 



elevato 



corpore late ellipt 



ntis 4-5 (plerumque geminatis) intra 



apice semicellulse 



polis 



m 



processus longos acute nodulosos product 



marginem lateralem 



spinis mm 



corporis utrobiq 



Long. 30-31,*; lat. cum proc. 54-62/*; lat. isthm. 7'6-oV 



crass. 1 1 



llab 



Mansang, near Hsipaw (N 



24193) 



This species is nearest to St, indentatum W. & G\ S, West (Freshw 

 186 t. 22, f. 10-12), but is distinguished in the front view 

 its broader and more quadrate semicells, with 



the different character of the 

 also more slender, and their a 



(which is elevated 

 are tridenticulate. In 



Alg. Ceylon, 1902, p. 



onately greater breadth, 



differently arranged verruca* at| the sides, and by 



broadly 



(not globose), and the margins of the 



furnished with 

 vertical 



pines). The processes are 



body of 



semicell is 



are as rousrh as in 





