VARIOUS KINDS OF HUMAN TWINS 



21 



teeth or hair. One strange case of parasite and auto- 

 site is cited by Blundell' and may be worth describing 

 in detail. This is the case of "a boy who was literally 



Fig. 2. — ^The upper figure shows Renault's twins (after Wilder), 

 which approach the condition of the Siamese twins, where both individ- 

 uals are complete or nearly so. The lower twins are t3T)ical Janus 

 monsters: (o) a Cyclopian; (6) a case in which what appears to be 

 a single broad face is really a double face in which the iimer half of each 

 component has been suppressed. 



and without evasion with child, for the fetus was 

 contained in a sac communicating with the abdomen 

 and was connected to the side of the cyst by a short 



'London Lancet, 1828-29, P- 260, 



