26 
away, the bar and tangles, 
tt 
УЛ 
fo Ee ) 
A 
УН 
Lf) 
= 
SS 
R 
‘apa 
SA 
SN 
CX 
Fig. 26. — “ Blake ” Trawl. 
1 A tangle-bar of great efficiency, con- 
sisting of two poles tied in the form of 
the letter A, with cross-bar and lines 
with fishing-hooks, has been used with 
great success by Mr. Marshall, to collect 
haleyonoids. A very similar apparatus is 
also used by the natives of the Philip- 
pines to collect euplectella. 
THREE CRUISES OF THE “ BLAKE.” 
which may be composed of a dozen 
to fifteen bundles, afford perhaps 
the most effective apparatus for 
collecting. 
terial sometimes brought up baffles 
description, and it is no easy task to 
separate the specimens from the tan- 
gled mass in which they have been 
caught. Thetrawlis by far the most 
useful instrument in deeper water, 
where the bottom generally consists 
of ooze or fine mud, — the finer in 
proportion to the distance from land. 
The trawl first used in deep water 
was the ordinary beam-trawl of fish- 
ermen. When this form of trawl is 
used in shallow water, it is easy to 
guide it or to weight it so that it will 
always fall on its runners and drag 
successfully. At great depths, how- 
ever, this form of trawl becomes ob- 
jectionable, from the impossibility, 
owing to currents or the drift of the 
vessel, of guiding it, no matter how 
well-balanced it may be, so that it 
shall not land on the beam, a mis- 
hap that involves great waste of time, 
sometimes a whole day, from unsuc- 
cessful hauls. .On the “Blake,” a 
modification of the trawl was used 
(Figs. 25, 26), which worked admira- 
The amount of ma- 
The members of the United States 
Fish Commission have also introduced a 
number of admirable modifications of 
dredges, trawls, tangles, and sieves ; and, 
in fact, every part of the dredging appa- 
ratus now necessary for deep-sea work 
has been greatly improved by the ex- 
perience obtained during more than ten 
