APPENDIX, 243 



I should have thought had been formed of coral, had it not 

 been said (Boteler's JVar., vol. ii. p. 39) that they were 

 composed of sand; not coloured. — Lathanis Bank is a 

 small island, fringed by coral-reefs ; but being only ten feet 

 high, it has not been coloured. — Monfeea is an island of the 

 same character as Pemba ; its outer shore is fringed, and 

 its southern extremity is connected with Keelwa Point on 

 the mainland by a chain of islands fringed by reefs ; 

 coloured red. The four last-mentioned islands resemble 

 in many respects some of the islands in the Red Sea, which 

 will presently be described. — Keelwa. In a plan of the 

 shore, a space of 20 miles N. and S. of this place is fringed 

 by reefs, apparently of coral : these reefs are prolonged 

 still further southward in Owen's general chart. The coast 

 in the plans of the rivers Lindy and Monghow (9 59' and 

 io° 7' S.) has the same structure ; coloured red. — Querimba 

 Islands (from io° 40' to 13 S.). A chart on a large scale 

 is given of these islands ; they are low, and of coral-forma- 

 tion (Boteler's Nar., vol. ii. p. 54); and generally have 

 extensive reefs projecting from them which are dry at low 

 water, and which on the outside rise abruptly from a deep 

 sea : on their insides they are separated from the continent 

 by a channel, or rather a succession of bays, with an 

 average depth of ten fathoms. The small headlands 

 on the continent also have coral-banks attached to 

 them ; and the Querimba islands and banks are placed 

 on the lines of prolongation of these headlands, and are 

 separated from them by very shallow channels. It is 

 evident that whatever cause, whether the drifting of sediment 

 or subterranean movements, produced the headlands, like- 

 wise produced, as might have been expected, submarine 

 prolongations to them; and these towards their outer 

 extremities have since afforded a favourable basis for the 



