( tj?7<5 ) 
c e. The two CaluMtta Cornea of tJhe Lcfc Ventricle, 
d. The Mitral Valve. 
f f. The Tendons Springing from the Carres Columfie, and 
inferred into the upper and middle parts of the Valre, as 
well as to its lower Margin ^ which is better expreft in the 
following Figure. 
g. The Orifice of the Aorta compleatly clos'd by the ap- 
plication of thefe three Valves to each other. 
Shewstbe fame parts expreft in the preceding Figure, 
as they appcar'd when the Valves of the Aorta were Petri- 
fied : The fame Letters alfo direfting to the parts already 
explain'd, except a. 
a.Part of one of the Valves which was not covered with 
the Petrifaftion. 
bbb. The Petrifaftions on the reft of the Valves* 
f A fmall Pctrifaftion on the Mitral Valve; 
h h h. Some of theTranfverfe Tendons which draw the 
Carney Columns to each other, when the Heart is in Sjjiol^^ 
for the more effeduai dofing the Orifice oi the Mitral 
Valve, expreft here ac g. 
Fig^ 4 and 5, 
Shews the fame parts reprefented in the two preceding 
Figqres, as they appear riew'd towards the Heart, when 
dry'd and difplay'd. 
A A. The Trunk of the Aorta. 
a a a. Fig* 4* The Sfmilunary Valves in a Natural StatCi 
when the Blood in the Arteries prefles them clofe to each 
other. 
b bbb. The Trunks of tte two Coronary Arteries cat 
eff. 
a a. Fig. 5. The Semilunary Valves PetrifyU 
c. The Orifice of the Mitral Valve next the iP^ii Pnlm- 
