Plate 1. Bathymetric map with 500 m contour interval, depth in kilometers, based on the same compilation of bathymetric data described in the caption of Figure 2. Illumination is from the NNE. The boundaries of the Puerto Rico-Virgin Islands block, the Puerto Rico trench, the Muertos Trough, the Mona Passage, and the Anegada Passage all have a clear bathymetric expression.