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Rh of it. In Angerona prunaria, the abdomen was dried up in consequence of the specimen having been long preserved, so that it was impossible to determine whether the peculiarity extended to the internal organization. In a specimen of Melitæa didymus, however, which admitted of dissection, the male organs were found complete and in their usual condition, and there was an ovary placed on the left side, having no connexion with any other organ. Another kind of Gynandromorphism is called superimposed, the sexual characters not being disposed transversely but according to the longitudinal axis of the body, whence two combinations result, the male parts being anterior, and the female posterior, or vice versa; this is of rare occurrence, and has been noticed only in a kind of ichneumon. Crossed Gynandromorphism, is when each side of the body presents at the same time the characters of the two sexes. This combination is rare, although much less so than the preceding. It has been observed in a Bombyx castrensis, in which the left antennæ and the right wings were female, the right antennæ and left wings male.