Abstract
Karyotypes were studied in 3 species of Antillean Anolis. A. blanquillanus has 2n=36 with 12 metacentric macrochromosomes, 24 microchromosomes, no obvious sex chromosome heteromorphism. A. nubilus has male 2n=29, and an X1X2Y sex chromosome system. It is identical in karyotype to neighboring species of the bimaculatus species group. A. monensis has male 2n=29 with an X1X2Y sex chromosome system, but details of morphology are different from nubilus. A. monensis is karyotypically indistinguishable from A. cooki of Puerto Rico, and it is argued that monensis is most closely allied to cooki and not to cristatellus as previous literature implied. Some field notes are presented for all 3 species. Display behavior confirms the close relationship between A. blanquillanus and A. bonairensis.

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