a reef or shoal in the Gulf of Mexico, off the north coast of Yucatan, from which it is 80 miles distant. It extends 14 miles from N. to S., and 11 from E. to W. On the south side there is a secure harbour, well sheltered by dry reefs. On the 12th of February 1847, the mail steamship Tweed was wrecked on this reef; and in January 1849 a similar disaster befell the Forth, another steamer belonging to the same company. Lat. of the port, 22° 23'. 6. N. Long. 89° 49'. W.