170 Proceedings of the Asiatic Society. [Ave. 
would be burned down and they themselves killed or expelled 
from the country.. A European when he goes into Tibet from 
Kumaon, Spiti or Eastern Ladak is not opposed with force, but 
he is starved out. The success of an expedition into these regions 
rests, therefore, principally in provisioning a party for a couple 
of months, which it is certainly not difficult to do. 
Another point to which Mr. Blanford alluded was the absence 
of any large moraines in the lower parts of Sikkim. The absence 
of any very extensive traces of glacial action in the N. W. Hima- 
laya is equally remarkable, as compared for instance with the Alps. 
Large moraines and glacial deposits are in the N. W. Himalayas 
chiefly confined to the central range and to the north of it. In the 
valleys on the southern side of the N. W. Himalayas traces of old 
debris may be often seen 38000 and 4000 feet above the present 
level of the rivers, but these accumulations appear with very few 
exceptions to be common river deposits. 
The following communications have been received : 
Ill. <A rrry List or Bencan ALGAE, DETERMINED By Dr. G. v. 
Marrens, communicated by Mr. S. Kurz. 
No. 2758. Oscillaria interrupta, Martens. On muddy ground of 
dried-up tanks, Bot. gardens, Calcutta, 
2759. <Anabena mollis, Kg.—Calcutta Botanic gardens, on mud 
along the edges of tanks, and in water. 
2760. Hydrocoleum violaceum, Martens, n. sp. 
Ceespite atroviolaceo ; vaginis diametro 1/180 ad 1/150 lin., arctis, 
pellucidis ; filis inclusis ternis v. pluribus, flexuosis, 1/360 lin, 
crassis, pallide violaceis, obsolete articulatis; articulis granulatis, 
diametro triplo brevioribus.—Calcutta, in stagnant waters of the 
Botanic gardens. 
2762. Lyngbya eincinnata, Kg., invested by Glaotila concatenata, 
Kg., and colourless inarticulate filaments like Leptothriz, but in- 
determinable.—Seebpore, Howrah, in swamps and tanks, inha- 
biting the culms of grasses. 
2763. Nostoe gregarium, Thuret.—Botanic garden, Calcutta, on 
inflorescences of a Fimbristylis, submerged in a tank. 
(Unicum.) Oserllaria Froeliehii, Kg,, with the same Leptothrix 
