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i.]
Volcanos.
15
confused, in others lateral cones and craters plainly shew themselves; a dense forest growth generally covers all from base to summit. All alike have coral forming a certain pro-
portion of their mass, the rock of coral formation varying with its age. Elevated terraces of coral appear in Futuna and the Loyalty Islands. The figure of Mota, in the Banks' Islands, shews the primary cone with a shoulder of later