EAST-INDIAN AKCHIPELAGO. 235 



although ten miles long, entirely consists of a bed of coral-rock 

 (Notices of E. Indian Arch. p. 58) : I believe from Horsburgh 

 that the island is low ; not coloured. — Taliow Bank, in some 

 old charts, appears like a submerged atoll ; not coloured. 

 Forrest (Voyage, p. 21) states that one of the islands near 

 Sooloo is surrounded by coral-rocks ; but there is no distant 

 reef. Near the S. end of Basselan, some of the islets in the 

 chart accompanying Forrest's Voyage appear fringed with reefs; 

 hence I have coloured, though unwillingly, parts of the Sooloo 

 group red. The sea between Sooloo and Palawan, near the 

 shoal coast of Borneo, is interspersed with irregular reefs and 

 ehoal patches; not coloured : but in the northern part of this sea 

 there are two low islets, Cagayanes and Cavilli, surrounded 

 by extensive coral-reefs ; the breakers round the latter 

 (Horsburgh, vol. ii. p. 513) extend five or six miles from a 

 sand-bank, which forms the only dry part ; these breakers are 

 steep to outside : there appears to be an opening through the 

 reef on one side, with four or five fathoms within : from this de- 

 scription, I strongly suspect that Cavilli ought to be considered 

 an atoll ; but, as I have not seen any chart of it, even on a 

 moderately large scale, I have not coloured it. The islets off 

 the northern end of Palawan are, like those off the southern 

 end, fringed by reefs, some way distant from the shore, but 

 the water is exceedingly shallow ; uncoloured. The western 

 shore of Palawan will be treated of under the China Sea. 



Phillippine Archipelago. — A chart on a large scale of 

 Appoo Shoal, which lies near the S.E. coast of Mindoro, has 

 been executed by Captain D. Eoss : it appears atoll-formed, but 

 with rather an irregular outline ; its diameter is about ten 

 miles ; there are two well-defined passages leading into the 

 lagoon ; close outside and all round the reef, there is no 

 bottom with 70 fathoms ; coloured blue. — Mindoro : the 

 N.W. coast is represented in several charts as fringed by a 

 reef; and Lnban Island is said by Horsburgh (vol. ii. p. 436) 

 to be ' lined by a reef.' — Luzon : Mr. Cuming, who has lately 



