ANIMAL ANOMALIES 



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pairs of legs and wings, two backs, and a single head has been 

 dissected and described by Dr. F. L. Fitzpatrick. The feather tracts 

 were double on the neck and trunk. Internal dissection showed 

 the single digestive system to extend between the two necks, follow 

 through the combined body cavity with some modifications, and 



Fig. 71. — Conjoined human twins showing- single hips but double trunk and head. 

 (Redrawn and modified from Arey, Development Anatomy, W. B. Saunders 

 Company. ) 



empty into the cloaca of the right back region. No cloaca was pres- 

 ent in connection with the left back. There was a single heart, two 

 very unequal lungs, two pulmonary arteries and veins to the larger 

 lung, while there was only one common carotid artery, that being 



