The results of the velocity surveys made on four deep (+ or -10,000 ft) wells in Trinidad are reported, together with summaries of the lithologic and stratigraphic data recorded by the wells. An unusual velocity inversion of 5,000 ft/sec between 2,500 and 5,000 ft depth is reported in one well, Moruga 15. The recorded data from the well surveys and from refraction surveys shot near the metamorphosed Northern Ranges in Trinidad are compared with published data reported by Worzel, Ewing, et al. in their refraction surveys within the Caribbean Sea, the Venezuelan waters near Trinidad, and Barbados. Comparison is also made with the results of refraction surveys in British and Dutch Guiana.