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Harris Hawthorne Wilder 



3, I am fortunate to have two partly diprosopic pigs, the one being the 

 remarkable Lambert embryo, Teras I, the other a new-born pig, Teras 

 XII, that represents a stage with less separation than the other. 

 Type 1. Cyclops eyes. 



II 



ni^ IV 



Fig. 20. Diagram of the cosmobiotic series leading from extreme Cyclopia, 

 through the normal, to complete Dicephaly. This diagram represents the 

 same series as that given in Fig. 1, although the separate stages are not 

 always the same. In this diagram, as in Fig. 3, the separate figures represent 

 cross-section taken through the heads at the level of the eyes and viewed 

 from above. Stage VIII represents a normal being; those before it are 

 oyclopie, those following it dicephalic. 



Case 1 (Teras VII). The eye of this monster, a Cyclops pig fetus, is 

 considered first because it is more double than that of the other case 

 studied, and the parts are consequently easier to identify. The speci- 

 men is Xo. 2913 of the Wistar Institute Collection, and the head is 



