Segments of tapeworm sent in to the U. S. Bureau of Animal Industry by Dr. Louis T. Cassidy of Norwich, Conn., were found on examination to beTaenia saginata. Among the segments was one presenting a meristic variation consisting in the unilateral duplication of the genital pore and canals in one segment with what is apparently the formation of a rudimentary genital pore alone on the side of the segment opposite the two pores which are provided with canals. The segment is enlarged, being 20 mm. long and 9.5 mm. wide, while an adjoining segment is only 15 mm. long and 7 mm. wide. The uterine branching is somewhat diffuse and irregular, and the eggs present some abnormalities of shape and structure. An examination of a number of eggs did not disclose the presence of any developed hexacanth embryos. The tapeworm segments were passed by a Polish child said to