The chromosomes of two B. ezoana males were studied. One had 2n=34 (16II+XyP); and one, 2n=32. The latter corresponds to a former finding (15II+XyP). The 2n=32 specimen was a chromosomally polymorphic mosaic having 28 to circa 61 chromosomes. Cells with 32 chromosome (48.6%) were commonest.
