364 



Mr. E. Gibson on the Ornithology of 



[Ibis, 



very much in a state of nature, in spite of some sixty sub- 

 stations with 100,000 sheep, a few thousand cattle, etc. 

 Situated just inside Cape San Antonio (latitude 36° S.), 

 it is bounded on the north by the estuary of the River Plate. 

 Our neighbour Leloir holds the adjoining Tuyu estancia, on 

 which actually is the Cape itself; while his boundary, again, 

 is the A^tlantic. The shore of the latter is sand, and a line 



Text-figure 3. 



Map of the Province of Buenos Ayres to show tlie situation of the 

 estancia Los Yngleses and Cape San Antonio. 



of shifting dunes (varying probably from half-a-mile to two 

 miles in width) extends from the Cape down as far south as 

 the Sierras of Tandil and Balcarce, where the first rocks or 

 cliffs occur at the now fashionable watering-place of Mar del 

 Plata (latitude 38° S.). The coast-line may be said to run 

 north and south ; but I am unable to account for the exis- 

 tence, inland, of numerous long sandy ridges (now covered 

 with vegetation) parallel to each other and all trending 



