218 



FRESH-WATER ALG^E FROM BUBMA. 



St. cyathoides Josh. (Burmese Desm. 1886, p. 642, t. 23, figs. 22, 23) may possibly be 

 related to St. protectum by reason of the form of the vertical view, but it is destitute of the 



bidenticulate warts, and the front view is very different in shape. 



143. Staurastrum subgemmulatum W. & G. S. West, Alg. Madag. 1895, p. 76 



t. 8, f. 34. 



Var. GRACiLius W. & G. S. West, 1. c. t. 8, f. 35. 

 Forma minor, cum annulis duobus granulorum circa processus unamquemque. 

 Long. 26*5^ ; lat. cum proc. 29-3 1/*. 

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



144. Staurastrum hexacerum (Ehrenb.) Wittr. Gotl. 01. Sotv. Alg. 1872, p. 51. 



Dcsmidiwn mxaceros Ehrenb., 1838. 



Staurastrum tricorne (Br^b.) Menegh. Synops. Desm. 1840, p. 225 ; Ralfs, 

 Brit. Desm. 1848, p. 134, t. 22, f. 11; t. 34, f. Sa. 



ffab.— Momauk, east of Bhamo (No. 21551). 



145. Staurastrum calodermum sp. n. (PI. xv, fig. 26). 



St. parvum, circiter tarn longum quam latum, leviter constrictuin ; semicellulas 

 ncudiformes, basi inflata cum seriebus transversis tribus granulorum, angulis in 

 processus breves crassos productis, annulis 4 granulorum circa processus unumquemque, 

 annulo ad basin e granulis geminatis formatis, apicibus processuum tridenticulatis' 

 apice semicellulaB leviter convexo et granulato ; a vertice visa quadrangulares (cum 

 processibus cruciformes), angulis in processus crassos attenuatos productis, lateribus 

 valde concavis, processibus cum annulis granulorum ornatis (annulo ad basin processuum 

 e granulis geminatis formatis), cum annulo granulorum geminatorum 8 in centre 



Long. 26/*; lat. (cum proc.) 26-32-6/*; lat. isthni. 9-5 

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



The onlv 



/* 



species approaohing St. calodermum is St. basidentatum Borge (Chlor. Norska 



1892 p. 8, t. 1, f. 5), but the former is distinguished by the inflated base of the semieells by 

 he deeply concave med«n part of the sides of the vertical view, and by the ring of geminate 

 granules at the apices of the semieells. e 



146. Staurastrum capitellatum sp. n. (PI. XV) fig. 29) 



St. parvum circiter If plo latius quam longum (cum ' processibus), leviter con- 

 stnetum ; seimcellula; subtrapeziformes, marginibus inferior^ ^ u .u, 10 

 latis, apice convex et verrucoso (verrncis bidenticulatis circiter 4 



et leviter undu 



), angul 



!^tltr CeSSU \ ^ CraSS ° 8 subca P^os productis, apidbus processuum cum 



denticulis minutia circ. 10 (visis 6), trans basin 



arum cum seriebus duobus 



granulorum mmutorum ; a vertice visae quadrangulares, lateribus concavis, angulis in 

 processus crassos subcapitals productis, verruca bidpnH™lo*o u • ai, & uus 



iitr tl hinnp ** ™™„ a • . . erruca wdenticulata supra basin processuum 



utrobique et verruca emargmata minuta intra basin processuum instruct. 



Long. 29^; lat. 26-33/,; lat. isthm. 9. 5^. 

 i/a&.— Mansang, near Hsipaw (No. 24193) 



com 



Tbj. BpMi « stand, mm u> S, «^» M W . *. G . 8 . w-j . ^ ^ . ^ b . 



