DESCRIPTION OF THE EXPEDITION. 169 
(1) (2) (3) (4) (5) (6) (7) 
No. Date. Locality. Depth. Net employed, Nature of Bottom. Remarks, 
F5. | Oct. 20. | Seychelles. 44 fms. | Trawl, 6 ft. Shells, Polyzoa, and 
(Chart, fig. 46.) coral-rubble. 
F6. | Oct. 20. 9 44 fms. Trawl, 6 ft. Sand, Some alge. 
F7%. | Oct. 20. 3 34 fms, Dredge triangular, | Sand, with weed. Heteropsammia 
3°25 ft. abundant. 
F8. | Oct. 20. 5 o4 fms. Dredge triangular, | Sand, shell, with 
3°25 ft. weed, 
F9. | Oct. 20. Ee 37 fms. Trawl, 4°5 ft. Hard sand. Frame bent and net | 
badly torn. 
Arprnpix B.—LIST OF THE STATIONS FOR PLANKTON. 
In collecting the pelagic fauna on the cruise five kinds of net were used, 7. e. :— 
(1) Fowler vertical closing-net, mouth 36 inches across, square, bag 108 inches long 
and formed of silk cloth, 60 meshes to the inch, such as is used for sifting flour in mills 
and known as bolting-cloth (fig. 5); (2) Wolfenden horizontal closing-net, mouth 8 feet 
when closed, bag about 34 feet long, of similar bolting-cloth to last; (3) large square 
open net, mouth 4 feet square, net 30 feet long, made of best mosquito-netting, 8 meshes 
to the inch; (4) open nets, our regular pattern, 18 inches in diameter, bolting-cloth 
60 meshes to the inch, 6 feet long; (5) open nets, 7 inches diameter, bolting-cloth 180 
meshes to inch, 3 feet long. For nos. 1 and 3 tins of upwards of 1 gallon were used and 
for nos. 2 and 4 light aluminium vessels each holding about 1 quart. To no. 5 bottles of 
4 oz. were attached, their catch being brought home in the same vessels without being 
decanted. 
Nets of 180 meshes to the inch (no. 5) were particularly intended to catch the small 
unicellular life, both animal and piant, which passes through nets of larger mesh. They 
were used in series with no. 4 down to about 100 fathoms to ascertain the depth at 
which such plant-life floats in the water during both the day and night, but their main 
purpose was for purely distributional work; single nets of our regular pattern (no. 4) 
fitted with a long bridle were employed while sounding and for any odd purpose. 
While the ship was at anchor during the night one of these nets was generally placed 
out over the stern and hauled in each hour, being generally given 10 to 20 fathoms of 
warp, so as to clear the ship. They were also used in series down to 800 fathoms, being 
clamped on to the wire as different amounts had run out. (See also pp. 18, 19, 23-25.) 
The positions of the hauls have been given as accurately as possible to the nearest 
minute. They can be seen at once by reference to Plate 1. The force of the wind and 
the strength of the swell are given on the Beaufort notation. 
