Of the next group, the Hermaphroditic, it may be said that a true hermaphrodite, in the full sense of the term, has not been found; but there have been several examples of individuals who had an ovary and a testicle, and other rudimentary sexual organs that belonged to both male and female. Forms of apparent doubling are common, and in case of doubt as to sex the probability leans toward the {75} masculine side. As to marriage in such cases, questions may arise that are to be settled by the anatomist. In dealing with double monsters it is sometimes difficult or impossible to determine whether we have to do with one or two individuals, and this difficulty has serious weight, especially in the administration of baptism. It is improbable that there is a doubling of personality in hermaphrodites. A striking characteristic of compound terata is that the individuals are always of the same sex; moreover, the embryonal development of reproductive organs in general is such as almost to preclude a question of duality of personality. Terata, more properly so called, are divided into single, double, and triple monsters. Single monsters may be autositic, or independent of another embryo or foetus; or they may be omphalositic, that is, dependent upon another embryo or foetus, which is commonly well developed, and which supplies blood for both through the umbilical vessels. When an omphalosite exists, the other foetus is called, in this case also, the autosite. The first order of autositic single monsters contains four genera with eight species, and under these species are thirty-four varieties. They may have imperfect limbs, no limbs, one eye in the middle of the forehead (_cyclops_), fused lower limbs (_siren_), and so on. Some of these monsters show a strong resemblance to lower animals, but there is no record that is in any degree scientific of a hybrid between a human being and a lower animal.