The ornitholo-gical results of the Mason-Spindel Expedition to Yucatan. Part I. Introduction; Birds of the Mainland of eastern Yucatan, no. 235 1926pp. 1-19. Part II. Chinchoro Bank and Cozumel Island, No.236 1926pp. 1-13. American Museum Novitates, 1926: Unpaginated. d [Zoological Record Volume 63]