EIO GRANDE DO SUL— COAST LAGOOXS. 



237 



separates from the sea extensive spaces that have been gradually changed to 

 brackish or even freshwater lagoons. These lagoons, beginning in the State of 

 Santa Catharina, are develoi^ed in a continuous chain, varying in size and form, 



Fig. 102. — Lagoa DOS Patos. 

 Scale 1 : 2.000,000. 



52° We-^toF Greenwich 



Depths. 



0to6 

 Feet. 



6 to 32 

 Feet. 



32 to 160 

 Feet. 



160 Feet 

 and upwards. 



30 Miles. 



some coraiDletely closed, others connected by creeks and communicating with the 

 sea by passages open in the wet, closed in the dry season. 



Behind this outer chain another has "been formed of still more irregular 

 outlines, and this system is connected by the Capivary with an inland sea about 



