Living bovine quadruplets were born on April 11, 1950, in Fukuoka Prefecture (Fig. 1). Their sire is a bull of Japanese breed and the dam a Holstein-Friesian cow. They consist of two males and two females. Their birth order was?male, female, male, female. Judging from the color patterns on the belly (Fig. 2 ), the hair whorls, the marks on the surface of the tongue (Fig. 3) and the muzzle prints (Fig. 4), leads one to believe that they originated from two eggs, the males and females being monozygotic respectively. The above mentioned characteristics, though not being mirror images, show identical conditions respectively in the males and females, and moreover the fact two placentae were produced later confirms the supposition of dizygotic origin of the four calves. The s u pposed free-martin effects on the females are to be studied and reported in future.