28 SEAWEEDS 
much lacerated, and should be collected at once to be 
of any value, since exposure quickly spoils them. 
The ordinary form of dredge used in securing 
zoological specimens serves for seaweeds, but is 
liable to become choked. Reinke’s dredge, armed 
with cutting teeth like spear- 
heads surrounding the mouth, 
has been found to be servite- 
able, and a simple contrivance 
shaped like the letter A, with 
sy, Strong fishhooks of the largest 
iW size on strong cords attached to 
the cross-bar, and the ends of the 
legs weighted, has been recom- 
mended, but requires skill and 
judgment in its use. It is likely 
to disappoint the experimenter 
unless under very favourable con- 
ditions. A light dredge can be 
| easily worked from a rowing- 
boat, which is also sufficient for 
tow-netting with fine silk nets 
for the capture of the free-float- 
ing minute Alge. The traveller who wishes to 
examine the minute pelagic Algz from the surface 
layers of the ocean can do so by obtaining permission 
to tap an inlet pipe of a steamship, and allowing the 
water to run through a fine silk bag for a time, when 
he will be rewarded with results similar to those 
from tow-netting. This method has been success- 
fully practised by its inventor, Dr. John Murray, of 
the Challenger expedition. 
U 
Fie, 1.—Reinke's Dredge. 
