cs2cs +proj=latlong +ellps=intl +towgs84=306,304,-318 +to +proj=latlong +datum=WGS84
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84d59'49.121"W  10d0'10.74"S 31.513
-77-10
76d59'47.965"W  10d0'10.464"S 79.573
-69-10
68d59'47.043"W  10d0'10.163"S 131.992
-61-10
60d59'46.373"W  10d0'9.843"S 187.748
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84d59'49.265"W  3d30'10.521"S -5.568
-77-3.5
76d59'48.124"W  3d30'10.424"S 43.143
-69-3.5
68d59'47.215"W  3d30'10.318"S 96.271
-61-3.5
60d59'46.554"W  3d30'10.206"S 152.782
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84d59'49.27"W   2d59'49.822"N -41.671
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76d59'48.13"W   2d59'49.739"N 7.064
-69 3
68d59'47.221"W  2d59'49.648"N 60.219
-61 3
60d59'46.561"W  2d59'49.552"N 116.758
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84d59'49.137"W  9d29'50.31"N -76.336
-77 9.5
76d59'47.983"W  9d29'50.048"N -28.203
-69 9.5
68d59'47.062"W  9d29'49.762"N 24.295
-61 9.5
60d59'46.394"W  9d29'49.458"N 80.135
-85 16
84d59'48.856"W  15d59'50.961"N -109.033
-77 16
76d59'47.672"W  15d59'50.523"N -62.121
-69 16
68d59'46.728"W  15d59'50.046"N -10.955
-61 16
60d59'46.042"W  15d59'49.539"N 43.469