THE FRESHWATER ALGZ OF CEYLON. 157 
129. MicnasrERIAS Crux-MeE ttrensis, Ralfs, Brit. Desm. 1848, p. 78, t. 9. fig. 8. 
Euastrum Crux-Melitensis, Ehrenb. 
Hab. With the preceding species. 
130. MICRASTERIAS MAHABULESHWARENSIS, Hobson, in Quart. Journ. Mier, Sci. 1863, 
p. 130; Lundell in Act. R. Soc. Scient. Upsala, ser. 3, viii. 1871, p. 15, t. 1. fig. 6. 
Var. SURCULIFERA, Lagerh. in Bih. till K. Vet.-Akad. Handl. xiii. Afd. 3, no. 9, 1888, 
no, & 2. ug. I. 
Long. 128 4; lat. 128-138 u; lat. isthm. 20 4. (Pl. 20. fig. 20.) 
Hab. Paddyfield between Kosgoda and Urahaighasmahendai. 
131. MicnasTERIAS ALATA, G. C. Wallich, in Ann. & Mag. Nat. Hist. ser. 3, v. 1860, 
p. 279, t. 8. fig. 11. 
Long. 153 u; lat. 132-138 u; lat. isthm. 15 a. 
Hab. Paddyfields, Heneratgodha. ^ Paddyfield between Kosgoda and Urahaighas- 
mahendai. 
132. MICRASTERIAS URNIFORMIS, sp. n. (Pl. 20. fig. 19.) M. parva, circiter 12-plo 
longior quam lata, profunde constricta, sinu aperto acutangulo; semicellule 
pyramidato-trapeziformes, cum angulis produetis, angulis basalibus lobiformibus 
truncato-rotundatis cum denticulis 4 instructis, lateribus superioribus valde retusis, 
angulis superioribus in processus breves truncatos tridenticulatos (vel trispinatos) 
productis, apicibus convexis; a vertice vise elliptieze, polis levissime truncatis et 
tridenticulatis; membrana minute punctulata. 
Long. cum spin. 59:5-61:5 u; lat. eum spin. 48-50 u; lat. isthm. 17-18 u; crass. 21°5 p. 
Hab. Paddyfields, Heneratgodha. 
133. MICRASTERIAS FOLIACEA, Bail. in Ralfs, Brit. Desm. p. 210, t. 35. fig. 3; 
L. N. Johnson, in Bot. Gaz. xix. 1894, p. 56, t. 6. figs. 1-4. 
Long. 69-76 4; lat. 63-70 u; lat. isthm. 12:5-14/5 u. 
Hab. Paddyfields, Heneratgodha. ^ Paddyfield between Kosgoda and Urahaighas- 
mahendai. 
134. MICRASTERIAS DECEMDENTATA, Arch. in Pritch. Infus. ed. 4, 1861, p. 726.  Euastrum 
decemdentatum, Naeg. Gatt. einz Alg. 1849, p. 123, t. 6 n. fig. 2. 
Long. 60-64 4; lat. cum spin. 64—71 u; lat. isthm. 13:5-15 p. 
Hab. Paddyfields, Heneratgodha. Stream, Victoria Park, Colombo. 
135. MicnasrERIAS THOMASIANA, Arch. in Proc. Dubl. Nat. Hist. Soc. 1862, p. 72, t. 2. 
figs. 1-5; Quart. Journ. Micr. Sci. 1862, p. 259, t. 12. 
Hab. Paddyfields, Heneratgodha. 
z2 
