EUASTRUM. 



197 



Var. Burmense var. n. (PI. xiv, fig. 10). 



Var. tumoribus tiibus trans .basin seniicellularuin, iis lateralibus minoribus; 

 semi-cellulse a vertice visaj cuui tuniore minore granulato utrobiciue inter 

 tumorem medianuin et polum unumquemquo. 



Long. 55/*; lat. 52/*; lat. lob. polar. 21/*; lat. isthm. 11/*; crass. 27«5m. 

 Hab.— In. the Kan-gyi at Mudon (No. . 24505). 



64. Euastrum truncatum Josh. Burmese Desm. 1886, p. 639, t. 23, f. 6, 



W. & G. S. West, Freshw. Alg. Ceylon, 1902, p. 152, t. 20, i 

 10 (char, emend). 



■ 



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



65. Eaustrum asperum Borge, Austral. Siisswasserchlor. 189G, p. 11. t. 1, f. 12. 



Long. 88/* ; lat. 44'5/t; lat. isthm. 14*5^; lat. lob. polar. 27-29 M ; craw. 30/*. 

 (PI. xiv, tig. 3). 



Hab. — Mansang, near Hsipaw (No. 23193). 



This interesting species appears to be well characterized by reason of the mamillate protuber- 

 ances across the base of the semicells. In side view it is even more characteristic, being unlik» 

 any other Euastrum of its kind. It has only previously been recorded from Queensland. 



66. Euastrum serratum Josh. Burmese Desm. 188*5, p. 639, t. 23, f. 1, 2. 



The following is an amended description of this species: 



E. submediocre, pame lf-plo longius quam latum, profundissime constrictum 



sinu angustissimo-lineari extremo subampliato ; semicellulse 5-lobae, incisuris lateralib 

 non profundis et subapertis, iis superioribus profundioribus quam iii inferioribus ; 

 lobis lateralibus breviter subrectangularibus, leviter bilobulatis, lobulis retuso-emargin- 

 atis; lobo polari oblongo-trapeziformi, lateribus retusis, angulis superioribus dentatis 

 et angulis inferioribus emarginatis, apice leviter convexo cum incisura mediana pro- 

 funda et aperta; tumore in centro semicellularum et scrobiculis binis supra tumorem, 

 verruca rotundata intra lobum lateralem unumquemque et verrucis emarginatis duobus 

 intra lobum polarem ; a vertice visae oblongo- elliptic*, tumore prominenti emarginato 

 ad medium utrobique, polis leviter trilobis; a latere vis* subovat* apice subacute, 

 prope basin tumore emarginato et apicem versus tumore emarginato minore utrobique. 



Long. c<V*J lat. 28'5/x; lat. isthm. 7-8^. 



The above description and measurements are taken from one of Joshua's original specimen., 

 of which we also give a figure (PL xiv, fig. 2). 



Joshua gives 53/. as the length and 35, as the breadth of his species measurement, winch are 

 josnua give* "*/* © . h of E truncatum, another of 



Sf te f \ th f " e S » -IT description, that hi, me_ots were a>so 

 Joshua's speo.es of which we P ubl18 ^ ^ Uned to think that Jo8hu a', measurement* 



longer than any of the specimens ~*Tj£ ~£ iofer that ,„» - lobta .... interne 

 are no more to be relied upon than h l8 ^ figures. ^ ^ ^ ^ ^ 



conspectis dUtincte serratis refers to the rounuea war 

 lacks precision and is very imperfect. 



Forma angulis inferioribus lobi polaris unidentat.*. 



Long. 47,; lat. 28, f lat. isthm. **; crass. 19, (P.. xiv, hg 



Hab 



Mansang, near Hsipaw (No. 24193) 





