Vol :aDO Ôsbima, Liza. 



17 



(I) the stoop slopo lias boon formed only on the east shore and 

 nowhere elso, and there is no apparent justification for supposing. 



Fig. 5. The steep slope along the tast coast of the island, viewed north- 

 "wards from the flat land at the southeast end, consisting of overflowed lavas 

 and éjecta (Fig. 1, 3e). 



tliat this side of the sea coast has been specially subject to wave 

 action ; (2) there is no such platform on the sea bottom of the 

 eastern side of the island as would be present if the steep slope 

 in question had been formed by marine abrasion. 



To explain these and other observed facts, the writer proposes 

 another origin, which seems to be more probable, i.e., that this 

 steep slope along the east coast of the island was formed by de- 

 pression of the eastern part of the volcano along a weak line 

 running in N.-S. direction. 



As to the time of its formation, it was no doubt before the 

 completion of the development of the somma, since many somma 

 lavas have obviously overflowed on this steep slope. The flat land 

 at the southeastern end of the island is a composite delta consist- 



