FRKSH-WA'l ER ALG.i) FROM !3!;EMA.
90. CossiAiUot LiEVE Rabenli. Fior. Europ. Al^. iii, 1868, p. lOi ; G. S. West,
Variation Desin. 1S99, p. :5SG, t. 10, f. 1-5.
Tlah.—Springs ou the river bank, Hliarao (No. Slòil).
Var. SEPTENTEIONALE Wille, Ferskv, Aig. Nov. Somlj, 1879, p. 43, t . 12, f.
34, G. a. West, 1. c. p. 387, t. 19, f. 7-9,
Long. 2ifi; lat. 14^; lat. isthm.
/iai.—JIaiipwe, N. Shan States (No. 22513). In swamp, Katha (No. 22677).
91. COSMARIU.M ANGULOSUM Bréb. Liste Desili.' 1850, p. 127, t. 1, f. 17.
Tlai. —Between Thiiigan-uyi-namig and Kawkareik. in thn side-ehannol of a
stieam (No. 24483).
92. CosiiAuiUM Menicghimi Bréb. in Ralfs Brir. Dcsm. 1848, p. 90, t. 15, f. 0.
Long. 17-4^; lat. IV; lat. isthm. 3-5;^.
II h.—Siugaiiig, ivyaukse district (No. 23193).
93. CosMAGinii Norimbergen-sk Reinsch 18C7; Algenti. Frank. 1867 p 113 t 9
1 2 . 1- . • '
C. Ilammcri Roimcii, var. oclogibhomm Reinsch, I. .c. p. 112, t. 10, f. 1.
C. OGiogihhomm (Reinscli) Turn. Freshw. Alg, E. India, 1893, p. 52.
C. oeiogibhosum var. indicam Turn. I. c. t, 8, f. 8.
Long. ll-5-l-r3^; lat. 9-5-15^; lat. isthm. 3-2-4'6/i,
Bab.—ilansang, near Hsipaw (¡lio. 24193).
94. CosMARioi ExiGuuir Arch, in Proc, Dubl. Nat. Hi.st. Soc. 1864, iv, p. 49,
t. 1, f. 32, 33; Nordst. Freshw. Alg. N. Zeal. 1888, p. 58, t. G, f. 12.
C. quadratulum (Gay) Do T.>ni forma javamoa Gat.w. Alg. Ins, Java
1902, p. 590, t. 38, f. 31.
Long. 15'3ii ; lat. isthm.
Hah.—lvi the Kan-gyi at :\Iu(lon (No. 2450ÓK Between Thingan-nyi-naung and
Kawkareik, in the side-channel of a stieam i^No. 24483).
' Another form of tUs species t a d tha lalora! margina of the seinicells slightly coaves and the
apes faintly retuse. It was also relatively a littb broader than typical C. nxiguim.
Long. 15/i; lar. 10m; lat. istlini. 2'2/ì; crass.
nah.— lw swamp, Katha (No. 22677),
95. CoSMAEicii TUEGIDUU Bréb. in Ralfs Brit. Desm. 1848, p. 110, t. 32, f. 8.
Var. LiGATDM var, n. (PI. xiii, fig. 7).
Var. constrictione cellul» multe profundiori, binu valde aperto efc subrotundato
ad apicem, angulis basalibus seiiiicellnlarum multe rotundatis; latitudo isthmi
psene f diametro transversalis r.ellulai.
Long. L53/i; lat, 63-67/^; lat. isthm. 40^4.
Hal.—In the Kan-gyi at Mudon (No. 24505).
COSMAEIUM. 20Ó
90. CoiMAEiUM coNNATUM Bréb. in Kali's Brit. iJesm. 1848, p. 108, t. 17. f. 10.
Forma paullu minor, Lon<r. 77/4 ; ht. 57'5ìì; lat. istiim. 48/i.
JJab.—In springs on üie river bank, Bhamo (No. 21501).
97. CossiAEiUM PSEUDOCONNATUM Nordst. Desm. Brasil. 1870, p. 214, t. 3, f. 17.
Var. i'XLirSüiDEUM W. & G, S. West, Freshw. Alg. Ceylon, 1Ö02, p. 108,
t, 20, f.'43-45.
Long. {)8-71;a; lat. 48-50/^; lat. isthm. 37-37• 5/x ; crass.
Hub.—iManSEiug, near Hsipaw (No. 24193).
98. Cos.MAiiiUii VJHIUE (Corda) Josh. New <ind Kare Uosra. 1885, t. 254, f. 3.
Colpopdtu viridis Corda, 1835,
Cosmarium Cordanum Bréb,, 1861,
Var. TEUNCi'i-UM var. n, (PI. xiii, fig, 12).
Var. minor, apicibiis truncatis.
Long. 27fi-, lat. 14-4-15-3ii; lat. isthm. 13^.
Mansaiig, near H s i p aw (No. 24193).
9.9. CoSUAEIUM PUAINII S(). n. (PI, XIV, fig, 12).
C. submediocre, paane l i - p l o lougius ijuam latum, p i o i u n d i s s i m e conatrictum, sinu
an g u s t o - l i n e a r i extremo s u b a m p l i a t o ; semicellulfe pasne semicirculares, angulis biisalibus
l e v i t e r rotundatis et granulo dentato singolo instructis, serie v e r r u c a r um emarginat
a r um circiter 14 i n t r a et j u x t a ambitu, in centro semicellularuin g r a n u l i s m a g n i s 12
q u i n c u n c i a l i t e r ordinafis et scrobiculis mimitis inter g r a n u l ö s ; a vertice visse s u b a c g u s te
ellipticie, ad medium utrobicjue leviter inflatce et granulis magnis 5 instructee, polis
t r i g r a n u l a t i s , serie A'errucarum e m a r g i n a t a r um intra m a r g i n em lateralem u n u m q u e m q u e ;
a l a t e r e visa3 subcirculares ; membrana- punctata.
Long. 51/ì; lat. 43;^; lat. isthm. 13-5^; crass. 26'5/4.
/iflj.—MaiiEang, near Hsipaw (No. 24193).
100. CoSMAUICM GLAl'HYHONOTUM sp. il. (PI. XIV, figS. 16, 17).
C. mediocre, ciici(cr l|-plo longius quam latum, profuiidissime conetrictum, sinu
aperto interdum angustiori nd extremuin ; semicellulfe transverse elliptico-oblongie, marginibus
lateralibus pceue semicircularibus, apice late truucato et subrecto ; membrana
grosse granulata, grauulis eubconicis magnis 0-7 ad marginem lateralem unumquemque,
apice glabro, granulis prope basili semicellal<e multe minoribus et regioue basali
glabra, cum scrobicniis minutis circa granulös in centro semicellularuni ; a latere visaì
depresso-circulflres ; a vertice visa- late ellipticit, granulis ad et intra margines laterales
magnis, regione centrali glabra.
Long, 57-(ì1-5/ì; lat. 42-45m ; lat. istlim. crass. 34-35^.
Mansang, near Hsipaw (No. 24193).
Tliis distinctive CosvKirmm occurred in obundanc-e, and it does not appear to be very closely
related to iniy other described speuies of the genus. The very deep constriction, the large size aud
conical shape of tlie 'granules ; the smooth, truncnta ape:i of the semicells, and the reduction in size
of the grailules townrds tlie base are charno.ers which easily dietinguisb. it.
I'erhnpa tlie only species with which it ueeds cumparsion are C. ¡jarudoxum Turn, and C.
prayrarnhjorm Bchmiclle.