FRE8H-WATER ALQYE FEOM BURMA.
Var. anguiis lobi polaris non productis et acute rotundatis ; lobis iateralibus
iiitegris, angulis inferioribus acute rotundatis et angulig superioribus
leviter productis et rotundato-conicis.
Long. 1 3 6 ^ ; lat. 102/^; lat. lob. polar. 7 0 ^ ; lat. isthm. 26^.
Mah.—Mansang, near Hsipaw (No. 24193).
This variety is characterized by the entire condition of the lateral lubes and the broad polar
lobe, the lateral angles of whieh are not produced. The angles of both the lateral and polar lobes
are oonical or even submamiUate, but never trimeate as in typical M. Möbü.
Genus : Cosman'um Corda.
79. COSUARIUM OBSOLETUM (Hantzsch) Eeiosch, 1867 ; Nordst. Alg. et Char, i,
1880, p. 7, t. 1, f. 9 ; W. & G. S. West, Brit. Desm. ii, 1905, p. 133,
t . 56, f. 1-3.
Var. SiTVENSi'. Gatw. Alg. Ins. Java, 1902, p. 594, t. 38, f. 39.
Long. 60/i J lat. 66/^ ; lat. isthm. 31/^.
/7ai.—Springs on the river bank, Bbamo (No. 21501). Momauk, east of Bhamo
(No. 21551).
80. Cos-MAKIUM DISPEBSUM Johnson, Rare. Desm. U. S. ii, 1895, p. 297, t. 240,
f . 19.
Forma TRUNCÌTA. (PL X7, fig. 17).
Forma paullo major, apicibus semicellularum distincte truncdtis.
Long. ö2m ; lat. óO^t ; lat. isthm. 13-5/i ; crass. 25/^.
fffli.—Singaiiig, Kyaukse District (No. 22193). Manpwe, N. Shan States
(No. 22513).
81. CosMARTUM SUBLATEREUNDATU.M. \V. &. G. S. Wsst, Alg. Madag. 1895, p.
60, t. 6, f. 1.
Forma lateribus semi cell ularuni 6-7-undulato-crenatÌ8, apice paullo angustioribus
et levitar 2-undulatis. Pyrenoidibus binis.
Long. 37;^; lat. 34-5M ; lat. apio. ló-15-5^ ; lat. isthm. 10M. ; crass. 17^'.
( F l . siii, fig. 13).
Momauk, east of Bhamo (No. 21551).
This form should be compared -with C. cydicum var. Nordilsdtii nob.
82. CosMARiijii CONTEACTUM Kirchn. Alg. Schles. 1878, p. 1 4 7 ; W. & G. S.
West, Brit. Desm, ii, 1905, p. 170, t. 01, f. 2 3 - 2 5 , 34. • ' '
flaJ.—Mansang, near Hsipaw (No. 24193). In the Kan-gyi at Mudon (No. 24505).
Forma apice semicellula! paullo elevatis, Iateralibus minus rotundatis.
Long. 27^. ; lat. 19/. ; lat. isthm. 4-5/x. (PL xrv, fig. 1).
S'af.—Mansang, near Hispaw (No. 24193).
COSMARIUM.
«3. COSMARIUM BIEEME Nordst. Desm. Brasil. 1869, p. 212, t. 3,
& G. S. West, Freshw. Alg. Ceylon, 1902, p. 165, t. 20, f.
Forma angulis basalibus subrectangularibus.
Long. 11/i.; lat. 10>i; lat. isthm. 3/^; crass.
Jlah.—Mansang, near Hispaw (No. 24193).
84. W. & G. S. West, Alg.
Ì. 33;
30.
COSMAB:UM SOBI'EOXUBERANS. 1 8 9 5 , p. 57,
t. 6, f. 40.
Var. SOBQUADEATUM var. n . - ( P I . xii, fig. 17).
Var. sinu nngusto-lineari, lateribus semicellularum minus divergentibu3
apice trun cato-retuso in medio.
Long. 19-23-5/ì; lat. 1 7 - 2 V ; lat. isthm. 4-8-5-2/1 ; crass. 15-17^'.
l/ü5.—Mansang, near Hsipaw (No. 24193).
85. COSMARIÜM PSEUDONITIDULUM Nordst. Norges Desm. 1873, p. 16, t. 1, f. 4.
Var. TALiDUsi nob.
C. pachydermtm Lund. var. minus Nordst. 1. c. p. 18, t. 1. f. 7,
Long. 6 3 - 6 7 / ì ; lat. 48-5-51m; lat. isthm. 17-19^^.
Ilah.—ln swaaip, Katha (No. 22677). Mansang, near Hsipaw (No. 24193).
86. CosMARmw GBASATUM Bréb. in Ralfs Brit. Desm. 1848, p. 96, t. 32, f. 6.
7/ui.—Minywa, Pegu District (No. 21975).
87. COHMARIUII IK.EQUAUPELI.ICUSI W. & G. S. West, Alg. Madag 1895, p. 54,
t. 6, f. 28, 29.
/ / d i . — I n springs on the river-bank, Bhamo (No. 21501). Mansang, near Hsipaw
(No. 24193).
88. COSMARIUM RETUSUM (Perly) Rabcnh. Flor, Europ. Alg. iii, 1868, p. 167;
Lund. Desm. Suec. 1871, p. 36, t. 3, f. 3.
(a) Forma sine granulis, membrana punctata, punctis ad ángulos basales
fortioribus; apicibus semicellularum leviter protractis et angustioribus.
Lung. 32'5/t; lat. 2 3 ^ ; lat. apic, U'o^a; lat. isthm. 6^.
Hah.—In the Kan-gyi at Mudon (No. 24505).
( i ) Forma minor, apicibus semicellulai-um minus protractis; membrana punctata.
Long. 2 6 ^ ; lat. 1 9 ^ ; lat. apic. lO-S^t ; lat. isthm. 6-5^; crass. 12^.
¿/„¿.—With the preceding form (No. 24505).
89. COSMARIUM IWGOSUM (Niig) Alch. in Pritch. Infus. 1861, p. 732.
Emstrum polygonum Nag. Gatt. einz, Alg. 1849, p. 120, t. 7Á, f. 9.
Long. 13-5-14/.; lat. 11-13-3,. ; lat. isthm. 2-5-3'3/i ; crass. lO'o/'.
i7ai.—Burdwan, in flooded rice-fields (No. 24674).