244 
APPENDIX. 
adjoining the land ; left uncoloured. I may here add that 
the shore of Kumi (lying west of Patcliow) has a narrow 
reef attached to it in the plan, in La Peyrouse’s Atlas ; but 
in the account of the voyage it is not stated to be of coral ; 
uncoloured. — Loo Choo : the greater part of the coast of 
this moderately hilly island is skirted by reefs, which do 
not extend far from the shore, and which do not leave a 
channel of deep water within them, as may be seen in the 
charts accompanying Captain B. Hall’s Voyage to Loo Choo 
(see also remarks in Appendix, p. xxi. and xxv.) There are, 
however, some ports with deep water, formed by reefs, in 
front of the valleys, in the same manner as happens at 
Mauritius. Captain Beecliey, in a letter to me, compares 
these reefs with those encircling the Society Islands ; but 
there appears to be a marked difference between them, in 
the less distance at which the Loo Choo reefs lie from the 
land with relation to the probable submarine inclination of 
the land, and in the absence of an interior deep-water 
channel. Hence I have classed these reefs, with fringing- 
reefs, and coloured them red. — Pescadores (west of 
Formosa) : Dampier (vol. i. p. 416) has compared the ap- 
pearance of these islands to the southern parts of England ; 
they are interlaced with coral-reefs ; but as the water is very 
shoal, and as spits of sand and gravel (Horsburgli, vol. ii. 
p. 450) extend far out from them, it is impossible to decide 
whether the reefs are of coral. 
China Sea . 1 — Proceeding from north to south, we first 
meet the Pratas Shoal (lat. 20° N.), which, according to 
Horsburgh (vol. ii. p. 335), is composed of coral, is of a 
circular form, and has a low islet on it. The reef is on a 
level with the water’s edge, and when the sea runs high, 
1 [The China Sea has in it many atolls. They are of large size, 
though not complete, most of them having the rim submerged, with 
the reef awash and islands on parts. Some are wholly submerged 
like Macclesfield Bank.] 
