Journal June 18 San Jorge, 25°44'N, 112°07'W, Baja Calif. Early in the morning drove to San Jorge, by the seacoast. It amounts to no more than a small fishing shack with a few boats, near the inner end of a long estero. At this point it is about 500 yds across, running southwest to the sea which may be heard roaring in the distance. Farther down there is a great mangrove island, and they also line the shores, apparently more thickly on the other side. The water is quite shallow, being not more than a foot at low tide for some distance. This morning I went down the shore south. Nearly there is a good sized mangrove swamp, and after that they line the shore, some places growing out into the water, other only at highest tides. For some distance the ground is flat and the water must come well back at times, for there is salicornia, mesembryanthemum, and other salt marsh plants in a damp surface. Behind this comes the gentle slope of a low hill, bearing ocotillo, fruitia, pitahaya agria, cholla and some others. All the bushes and some pitahaya are heavily burdened with orchilla. Nearer the water there are a lot of dulce mangroves, quite similar but