ANIMAL. ANOMALIES 



657 



Fig. 355. — A case of harelip due to arrested development. 



Diaphragmatic Hernia (Open Diaphragm) 



An extreme case of this was found in a cat which was being used 

 for dissection purposes. The animal had lived an apparently normal 

 life and had been killed for laboratory study without showing evi- 

 dence of its abnormality until dissected. From all appearances the 

 diaphragm had not completed its development, but had formed a 

 fringelike projection which reached inward about half an inch from 

 the thoracic wall and extended the entire circumference of the in- 

 side of the thorax. The aperture in its center measured one and 

 three-fourths inches in diameter. 



Due to this condition the arrangement of several visceral organs 

 was greatly affected. The thorax was somewhat elongated, and the 

 right side of the cavity comprised about two-thirds of the space 

 of the chest. The mediastinum (supporting median mesentery of 

 heart and lungs) had its attachment more than half an inch to the 

 left of the midline. 



Almost the entire liver was turned forward to occupy the right 

 two-thirds of the chest cavity, and this placed the gall bladder at 

 the level of the junction of the auricle and ventricle of the heart. 



