Geographic variation in Poecilia Bloch and Schneider, 1801 (Teleostei: Poeciliidae), with descriptions of three new species and designation of lectotypes for P. dovii Gunther, 1866 and for P. vandepolli van Lidth de Jeude, 1887. Proceedings of the Biological Society of Washington, 116(2), 11 August 2003: 356-379. 370 [Zoological Record Volume 139]