elxvi Proceedings of the Asiatic Society of Bengal. [N.S., XV, 
which are superseded would perish but it would be strange if all 
such forms perish all of a sudden. It would be more likely that 
disappearance. Many forms, therefore, which, like paar pers 
or the Liverworts, are apparently perfectly sound and se 
supporting to all intents and purposes are really on the yeaa 
ward slope leading to extinction, though some like the Junger- 
manniales show a flicker before final disappearance. My firm 
belief is that Rethel og: has played a far more important 
part than is generally believed: in is history of the Vegetable 
Kingdom 
The Myxophyceae of Lahore.—By S. L. Guoss. 
, Practically no work has been done on the Indian blue-green algae, 
with the exception of a few pails of some species by foreign writers. 
The blu m algae in Lahore are found in (1) dra ne and water- 
courses, (2) artificial tanks, (3) natural ponds oe P ikem gy (4) lawns 
i unks. 
nds, after 
Habit and description of the “sagan ag speci are given :—(1) 
ur tidus, Kuet: 
Clathro nf, : 
Gsciligtoria terebriformis, Gom.. (6) Oscillatoria tenuis, Ag., (7)., Arthro- 
spira Jenneri, Kuetz. ini ; 
» Vauch, 
Kuetz., (16) 7 othriz distorta, Kuetz.. (17) Tolypothrix byasoidea, 
pene Bids olypetire arenophita, West, (19) eset besa Berk. 
trial forms perennate by e ing themselves 
an. k, firm s dine ro Re esting spores have been preven: in all stages 
a ek prs in Tolypothrix distoria, Kue ay 
Conclus A more detailed research into the modes of peren- 
nation, m multipli cation and ie Pen cines is til needed to complete the 
study of the blue-green algae of Lahor 
Variation in the — of Jasminum malabaricum, Wight. 
—By H. H. Man 
fina flowers of the jasmines are reap sgpac — as to the number 
of corolla-lobes and calyx teeth which they ain. A recent stay in the 
acighbourhood of he Western Ghats in re Istitude of Belgaum in Pavia 
d May enab statistical study of these variations in Jasmenum 
malabari isin: in an wadoubtedly eae condition, to be made. Nearly 3, "060 
corcllae were examined, and ov ,500 calyces. 
The variation in ie pet of corolla lobes is between three and 
twelve, the most frequent aciabore peng. eight. A smaller number than 
the mode is more likely than a larger number. The standard deviation 
. e ¥ 7 ari- 
Th the 
four and eight, five and six being a almost equally freq ent. The standard 
iation is 0°614, with a probable error of + 000155 55, the variation being 
plies. 
results indica: the variation is chiefly a proegetont of the 
individuality of the plant, ohena! that the number of calyx teeth se not 
determined by the position on the plant, or by the sasitaeas - laten 
the — ers. 
The correlation between the number of — lobes and of calyx 
teeth is positive, but slight. The coefficient of correlation works out at 
