nsfw:racy: Very Likely | adult: Likely ocr: Section of sland with Barrier-Reet CNot to scale) A" C' A" A L B' B' C A Level of Sea AA. Outer edges of the barrier-reet at the level of the sea, with islets on it. B'B. The shores of the included island. CC. The lagoon-channel. A"A". Outer edges of the reef, now converted into an atoll. C. The lagoon of the new atoll. N. B.-According to the true scale, the depths of the lagoon-channel and lagoon are much exaggerated. DARWIN: VOYAGE OF THE BEAGLE