THE FRESHWATER ALGZ OF CEYLON. 173 
208. COSMARIUM HAYNALDII, Schaarschm. in Magyar. Tudom. Akad. math. és Termész. 
Közlemények, xviii. 1882, p. 267, t. 1. fig. 5. 
A slightly more angular form with the apical papillze very prominent and spine-like. 
Long. (cum papill.) 31 4; lat. 30 4; lat. isthm. 7:5 u; crass. 16 y. 
Hab. With the preceding species. 
209. CosMARIUM FREEMANII, sp. n. (Pl. 21. figs. 8-10.) C. parvum, 1}-plo longius 
quam latum, profunde constrictum, sinu angusto-lineari extremo ampliato; semi- 
cellule late pyramidato-trapeziformes, angulis inferioribus subrectangularibus, 
lateribus convexis in parte inferiore denticulis 4 (summis maximis) preeditis, angulis 
superioribus dente obtuso singulo instructis, apicibus truncatis subrectisque, granulo 
magno intra angulum inferiorem unumquemque, serie granulorum magnorum 3 
infra apicem (nonnunquam granulis bipartitis), granulis magnis 2 supra centrum 
semicellularum ; a vertice vise elliptieze, polis granulis distantibus 3 et granulis 
magnis 3 ad medium utrobique instruct; a latere vise subcirculares, granulis 
magnis binis supra medium utrobique et dente obtuso ad medium apicis; pyre- 
noidibus binis. | 
Long. 31-33 u; lat. 26-28 u; lat. apic. semicell. 13 4; lat. isthm. 8 u; crass. 18-19 p. 
Hab. Paddyfields, Heneratgodha. 
Compare with C. trinotatum, Eichl. & Gutw. (in Rozpraw. Wydz. Akad. Umiej. 
Krakow, 1894, p. 166, t. 4. fig. 14), from which it differs in dimensions and in the 
arrangement of its granules. 
210. CosMARIUM CUNEATUM, in Josh. ‘Burm. Desm., in Journ. Linn. Soc., Bot. xxi. 
1886, p. 647, t. 24. figs. 17, 18. 
Long. 35 u; lat. 35-37 m; lat. isthm. 8-9°5 u; crass. 15 u. (Pl. 21. fig. 11.) 
-Hab. With the preceding species. 
Joshua’s figure of Burmese specimens of this species is so very poor and inaccurate 
that we feel compelled to give a figure of some examples from Ceylon. The vertical 
view was well figured by Lagerheim in Bih. till K. Sv. Vet.-Akad. xiii. Afd. 3, no. 9, 
t. l. fig. 4c. ; 
The basalangles of the semicells are faintly emarginate, and on each lateral margin 
are three very small papillee ; otherwise the margin is quite smooth. The fourteen large 
flattened granules are entirely within the margin and are uniform in size. 
The cells are most frequently met with in pairs, not seeming to separate very readily 
after division. 
C. cuneatum, ? var. indicum, W. B. Turn. (in K. Sv. Vet-Akad. Handl. xxv. 1893, 
no. 5, p. 62, t. 9. fig. 14), most certainly does not belong to C. cuneatum, Josh. 
211. COSMARIUM SPINULIFERUM, sp. n. (Pl. 21. figs. 12,13.) C. parvum, tam longum 
quam latum vel paullo longius, profunde constrictum, sinu angusto-lineari extremo 
subampliato ; semicellule truncato-semicirculares, angulis rotundatis, apicibus sub- 
rectis, spinis brevibus (vel papillis acutis) 6-7 ad marginem lateralem unumquemque 
et seriebus irregularibus 2-3 intra marginem, intra apicem spinis 4-6 instructz, in 
EK 
