30 PERCY SLADEN TRUST EXPEDITION. 
of work Fletcher undertook charge of the entomology, we handing over our collections 
to him from time to time. Simpson made a careful collection of the plants of Boddam, 
while we made independent collections from other islands {both from land and sea. 
Mr. Alexander ran sections for us with the theodolite across three of the islands, and one 
or the other of us visited and thoroughly examined every island and every mile of the 
reef. We also dredged the lagoon, examined a large number of its shoals, collected the 
Fig. 10. 
” 
seve mam 
uviowwsre O14 
rae 
Seer, d 
c a 
— AN at 
12-17 Fathoms 
137 
A 
RAIA AA 
S27 
1000 3000 4900 5000 6000 
ae a ee ase Seer 
Chart of Salomon Atoll (after the survey by Comm. B. T. Somerville and the officers of 
H.M.S. Sealark). 
plankton inside and outside the atoll, measured the currents in the passage, and getting 
two fine days examined the outer edge of the reef and its slope. 
storing of the collections, too, was no light labour. 
In the plan of the survey the triangulation had to be drawn out, a base-line measured, 
flag-posts erected on every island, and bearings taken from each. The outline of each 
island had then to be carefully placed in, and the reef outside accurately measured. 
After this the lagoon had to be closely sounded, so that not even the smallest rock should 
The preparation and 
——_ 
— = 
