MONSTKOSITIES 205 



TIic pygopagus. — Dr. Vaerst, at Meiningen, described an 



Fig. 24. — Dioephalus. 

 interesting case. After the first calf was almost completely 



Fig. 35. — Pigodidymus Aversus (Vaerst). 

 born, it could not be extracted. By exerting traction witli six 



