Pi. XXI. Outline Map of the Peninsula of Yucatan. 



Very little indeed, is known of the peninsula east of the loth degree of 

 longitude, or south of the 20th degree of latitude (Washington). The whole area 

 of the State of Yucatan north of ig" 30' is a vast, nearly level, dry plain, having 

 nowhere an altitude much exceeding 100 feet above the sea level. 



