Vol. go aS 8-9.] Biological Work of the ‘‘ Investigator.’’ 333 
[V.8.] 
plants to form a ‘‘ dust-fine detritus ’’ some of which is deposited 
the sea-bottom and which appears to form the chief 
food supply of many of the Uctluaoy. Polychaeta, and Echino- 
Port Owen, Tavoy Island, produced apparently by the ais 
tion and decomposition of land ve getation and brought dow 
to the sea by the streams and rivers at these points. 
SHORE COLLECTING. 
ring the course of the two seasons I have been able to 
f 
tions on the mainland from those on the various islands 
scattered along the coast. 
MarInuaND SraTIons. 
Hinzé Basin.—The entrance to the Basin consists of a 
wide channel about two miles in length and gradually narrow- 
ing from one and a half miles across at the entrance to about 
three quarters of a mile at its inlet into the Basin proper. Th 
shores of the entrance partake of the nature of the neighbour- 
ing coast-line and consist of a series of small sandy bays, 
separated by reefs of rock and boulders. The Basin itself is 
as y the union of three large creeks on the north and 
ast, aid one smaller une on the west; the creek on the south- 
peers "eventually runs into the sea about fourteen miles further 
down the coast. The shores of the Basin, as far as they have 
been sabbapha cane consist almost entirely of Mangrove-swamps 
and mud-flats 
I remained in camp here from December Ist to 13th, 1910, 
and during the whole of that period the water at the entrance 
to the Basin was frequented by a species of Sirenian. These 
were all, apparently, examples of Halicore dugong, Illiger, and 
on one occasion as many as eight were seen together. : 
Close to the camp was a small freshwater stream that 
flowed into the sea just insidethe entrance. This was frequented 
y numbers of larze tadpoles, each marked with a row of 
three or four eraeaaean 54 ocelli on the tail: it is interest- 
ing to note that these appear to belong to the same species as 
certain specimens obtaiied by cock from the Pamirs, at a 
height of 8,500feet. They have been identified by Dr. Annandale 
as the tadpole of Rana alticoia, Bingr. (Annandale, 1912, p. 22, 
pl. iv, fig, 1). 
