80 



DK CHARLES J. FATTEN. 



TI. — Table showing the cardiac and thoracic Indices in different 



mammalian groups. 



From the above Indices a correspondence can be made out 

 between the transverse and antero-posterior diameters of the 

 heart and of the thorax in each animal. 



Conclusion. 



In conclusion, let me add that my remarks on the form of 

 the heart of man have not been based on observations made on 

 only one or two specimens. Last winter I examined in all 50 

 specimens, 10 of which were specially hardened in formalin. 

 In the case of those which were not hardened, I avoided 

 displacing the organ as it lay in the sac of the pericardium, and 

 so proceeded as follows : — 



I opened the pericardium from the front with a crucial 

 incision, and separated the flaps by turning them outwards. 1 

 then took a tracing of the form of the heart. From the 

 tracings, as well as from the actual specimens, my friend, Mr 

 C. K. Bushe, kindly made me some drawings (see Plate V.). 



