CLASS 8 .-- Parasitic monsters.

CLASS 9 .-- Monsters with a single body and double lower extremities.

CLASS 10 .-- Diphallic terata.

CLASS 11 .-- Fetus in fetu, and dermoid cysts.

CLASS 12 .-- Hermaphrodites.
CLASS I .-- Triple Monsters .-- Haller and Meckel were of the opinion that no cases of triple monsters worthy of credence are on record, and since their time this has been the popular opinion.