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CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



brakes of any size are formed by them. There are but two 

 islands in the group on which this region is well developed, 

 Albemarle and Chatham, On both of these the belt in question 

 is used for grazing purposes by the inhabitants. The upper 

 part of the highest crater on Charles Island is also covered by 

 this region, but the area here is so small as to be negligible. 

 The following table shows the elevations in feet at which the 

 different regions end at the various places on the islands visited 

 by our party. The islands not mentioned are either too low to 

 possess more than the dry region, or their regions are so ill 

 defined as to render the exact limits impossible of determina- 

 tion. Elevations which are followed by an asterisk are esti- 

 mated, the estimates often having been made from a few miles 

 out to sea by comparing the elevation of the place in question 

 with that of some other place the elevation of which was 

 known. 



Zonal Elevations 



From this table it appears that there is often a great differ- 

 ence in the elevations at which a region begins and ends on the 

 same sides of different islands as well as on different sides of 



