Geology.] 
NATCJRAL HISTORY. 
615 
Vansittart Bay, about one hundred and forty miles 
north-west of Cambridge Gulf. — Reddish quartzose sand- 
stone^ or quartz-rock. Indistinct specimens of greenstone^ 
with adhering quartz ; apparently a primitive rock. 
Port Warrender, at the bottom of Admiralty Gulf, about 
forty miles south-west of Vansittart Bay, (Narrative, vol. i. 
p. 322, 323 .) — Epidote and quartz, in small crystals con- 
fusedly interlaced ; apparently from veins, or nests, but un- 
accompanied by any portion of the adjacent rock. — The 
structure in one of these specimens approaches to the 
amygdaloidal. A compact greenish stone, with dissemi- 
nated crystalline spots of epidote, and of quartz, and appa- 
rently consisting of an intimate mixture of those minerals, is 
also among the specimens from Port Warrender. 
All these specimens are from detached water-worn 
masses at the foot of Crystal Head, on the south-west of the 
port. The summit of the head is flat and tabular, and the 
rocks in the vicinity are described by Captain King as con- 
sisting of siliceous sand-stone. Calcedony, apparently from 
amygdaloid of the trap formation, was also found at Port 
Warrender. 
The epidote of this place is in general of a pale-greenish 
colour, but is mixed with, and sometimes appears to pass into, 
spots of a rich purplish-brown. The specimens resemble 
generally the epidote of Dauphiny and Siberia; but Mr. 
Levy, who has been so good as to examine them, informs 
me that the crystals exhibit some modifications not de- 
scribed either by Haiiy, or by Mr. Haidinger in his paper on 
this mineral, and which are probably peculiar to this locality. 
Water Island, on the west side of Cape Voltaire, at 
the south-west entrance of Port Warrender, is described 
(vol. i. p. 395) as consisting of quartzose sandstone ; as is 
