•¿04 FRESH-WATER ALGIE FROM BURMA.
Class: HETEKOKONT^.
Order: CONFERVALES.
Family: TEIJiOKEMAOE^-
Genus ; Ophioeytium Nag.
198. OPHIOCYTJUM MAJUS Niig. Gatt. elnz. Alg, 1849, p. 89, t. 4 A, f.
Lemm, Gen. Opliiocytium, 1899, p. 29, t. 3, f. 3-5.
Kyauktaga, Pegu district (No. 22124).
This and several other speoies of tlie genus Ophiocytiitm are geuerally distributed in the s
and stagnant pools of liotli temperate and tropical regions.
199. OPHIOCYTIUM COCHLEARE (Eicliw.) A. ]3r. Alg. unicell. 1855 ; Rabenh. Fior.
Europ. Alg. iii, 1868, p. 67; Lemm. I.e., p. 30, t 3, f. 10-12.
Forma; diam. cell. 8"5/i. (PI. 11, fig. 13).
5a5.—Mansang, near Hsipaw (No. 24193).
200. OPUIOCYTIUM DICUSPIDATUM (Borge) Lomm. I.e., p. 31, t. 3, f. 13-15. 0. mafus
Nag. Tar. hÌGUspi/iaitm Borge, SUssw. Chlor. Archaag. 1894, t. 1, f. 3.
Small forms ; diam. cell. 6-5/x.
Sab.—l-a swamp, Katha (No. 22677).
201. OPHIOCYTIDM PARVDLUM (Perty) A. Br. Alg. unicell. 1855, p. 55; Lemm.
I.e., p. 33.
Brochidium parvulum Perty.
iZai.—Mansang, near Hsipaw (No. 24193). Between Thingan-nyi-naung and
Kawkareik, in the side-channel of a stream (No. 24483).
202. OPHIOCYTIUM ELOKGATUM sp. n. (PI. xi, ligs. 11, 12).
Cellula singnlse, libere viventes, perlongie, irregulariter arcuata^ vel flexnosofiliformffi,
diametro usque ad 70-plo longiores, uno polo rotundato altero spina parva
curvata instruciie.
Crass, cell. 5-5-5/t ; long. spin. 3-7-4'7/i.
Hab.—ln swamp, Katha (No. 226T7).
This speoiea ditìers from 0. Lagerhetmii ia its solitary habit, its broider and much longer oelle,
end in the very mnoh shorter spine. It is more sleader than 0. cochleare (Eiohw.) A. Br., aad the
cells are more elongate and not closely coiled.
Genus : THbonema Derbes & SoHer.
13. TRIBONEMA BOMBYCINUM (Ag.) Derbes & Solier, MÉM. : physiol. Alg. 1856,
p. 18, t . 4, f. 1 6 - 2 1.
Conferva homhycim Ag., 1817; Kutz. Spec. Alg. 1849, p. 371; Lagerh. Stud.
Gatt. Conf. u. Microspora, 1889, p. 194-209, t. 6.
Forma MINOR (Wille) G. S. West, 1904.
Conferva bombydna Ag. iorma mtnor Wille, Ferskv. Alg. Nov, Semlj. 1875,
p. 65, t. 14, f. 89.
Hab.—In springs on the river bank, Bhamo (No. 21501),
This plant is commonly found ia spriogs, in slow rivers, and in large ponds and lakes in which
the water is constantly renewed, It is generally absent from stagnant pools, preferring better
conditions of ajration.
C l a s s : BACILLAKIE.®.
Order: CENTRIC^.
Family: MELOSIÌtACE^;.
Genus: Melosira Ag.
204. MELOSIRA VARIANS Ag., 1830; W. Sm. Brit. Diat., ii, p. 57, t. 51, f. 333.
Mab.-In river Irrawaddy, Thayctmyo (No. 22999). In the mountains eaat
of Kawkareik (No. 24450). In swift river, Myawadi (¡^0. 24451). Between Thingannyi
naung and Kawkareik, in the side-channel of a stream (No. 24483).
205. MELOSIRA GRANDLATA Ralfs in Pritcb. Infua. ed. iv, 1861, p. 820.
Mab.—In the Pegu-Sittang canal, Minywa, Poga district (No. 21975).
Order: PENNATA.
Family: FEA(}ILARlAOE^.
Genus: Fragiiaria Lyngb.
2 0 6 . FRAGILARIA VIRESCENS' R a l f s i n A n n . ig. Nat. Hist., 1843, ser. 1, xii,
p. 110, t. 2, f. 6.
ITai.-Momauk, east of Bhamo (No. 21551). Hsipaw (No. 24120). In the
mountains east of Kawkareik (No, 24450).
Genus: Synedra Ehrenh.
207. SYNEDRA ULNA (Nitzsch) Ehrenb. Infus, p. 211, t. 17, f. 1- Rabenh FLNR
Europ. Alg. i, 1864, p. 133. ' '
JZai.-Banks and backwaters of the Irrawaddy at Bhamo (No. 21502) In ih.
Pegu-Sittang canal, Minywa (No. 21975). In stream, Lashio (No. 22557) In river
Irrawaddy at Thayetmyo (No. 22999). In the mountains east of Kawkareik (No
24450). In river, Myawadi (No. 24451). »WJiareiic (ÌNO.
ANN. EOV. BOI, GAKD, CALCUTTA TOL. V I.