EXPLANATIONS. 



Stations actuiilly ubservetl ;ire marked with o, wLiile those not 

 yet obserYed are shown by x . 



Soundings are given generally in meters, it not otherwise stated. 

 Contour lines are given by 



Median lines and mouth lines are shown by — — . 



Orientation of eaeh map is shown by an arrow which points 

 to north. 



