APPENDIX. 
edit.). Cook found deep water (20 fathoms) in some of the 
harbours within the reef. Mr. Couthouy, however, states 
(Remarks, p. 45) that both at Tahiti and Eimeo, the space 
between the barrier-reef and the shore has been almost 
filled up, — ‘ a nearly continuous fringing-reef surrounding 
the island, and varying from a few yards to rather more 
than a mile in width, the lagoons merely forming canals 
between this and the sea-reef,’ that is the barrier-reef. 
Tapamanoa is surrounded by a reef at a considerable 
distance from the shore ; from the island being small, 
it is breached, as I am informed by the Rev. W. Ellis, 
only by a narrow and crooked boat-channel. This is the 
lowest island in the group, its height probably not ex- 
ceeding 500 feet. A little way north of Tahiti, the low 
coral islets of Teturoa are situated ; from the description of 
them given me by the Rev. J. Williams (the author of the 
Narrative of Missionary Enterprise), I should have thought 
that they formed a small atoll, and likewise from the de- 
scription given by the Rev. D. Tyerman and G. Bennett 
(Journ. of Yoy. and Travels, vol. i. p. 183), who say that ten 
low coral islets ‘ are comprehended within one general reef, 
and separated from each other by interjacent lagoons ; ’ but 
as Mr. Stutchbury (West of England Journal, vol. i. p. 54) 
describes it as consisting of a mere narrow ridge, I have 
left it uncoloured. Maitea, eastward of the group, is classed 
by Forster as a high encircled island ; but from the account 
given by the Rev. D. Tyerman and G. Bennett (vol. i. p. 57) 
it appears to be an exceedingly abrupt cone rising from 
the sea without any reef ; left uncoloured. It would be 
superfluous to describe the northern islands in this group, 
as they may be well seen in the chart accompanying the 
4to. edition of Cook’s Voyages, and in the atlas of the 
Goquille’s Voyage. Maurua is the only one of the northern 
islands in which the water within the reef is not deep, being 
only 4^ fathoms ; but the great width of the reef, stretching 
