The British Guiana Museum. 275 
further information. From the foregoing pages, it is 
obvious that there are in the colony scores and scores 
of desirable objects which must be added to the collec- 
tions to make the Museum as it seeks to be, a representa- 
tive institution ; and if the benefit of hearty and aftive co- 
operation, from high and low, and from rich and poor, 
were given to it, the time would not be far distant when 
it would be possible to point to it as being an institution 
reflecting the highest credit on the colony that supports it. 
NOTE. — Since the foregoing has been in press, the 
following interesting additions have been made to the 
collections : — 
1. A sample of Saccharine or carbolic sugar, which is 
exhibited with the other coal-tar products. This substance 
is more than 200 times sweeter than ordinary sugar, and 
can be used in many cases where ordinary sugar is not 
advisable for the human subject. 
2. A very fine and rather large quartz crystal from the 
top of Mount Roraima. The specimen is a clouded 
quartz, and shows clearly the hexagonal prism. It was 
taken from the water at the bottom of one of the basins, 
which are followed out in the sandstone, by Mr. DRESSEL, 
who a few weeks ago ascended the mountain. These 
crystals form a portion of the ordinary loose mass at the 
bottom of these basins. The specimen is shewn near the 
specimens of gold in the mineral case. 
3. The skull of a poisonous snake (Labarria, Trigono- 
cephalies atrox ?) which well illustrates the stru6lure of 
the skull of the Viperine snakes as described in the fore- 
going pages. The preparation has been made from a 
somewhat damaged and dried up head. On one side, the 
