( l? ? ) 
ted, open themfelves in the Pofterior Part of the Au- 
ricula finijlra, by a common Oval Orifice furnifhed vv i : h 
t wo Semilunar Valves $ by which means they pour into 
this Auricle all the Blood that comes from the Lungs 
to the Heart* 
By all that has been obferved concerning the Stru- 
cture of the Heart of the Land Torroife of America , and 
the Difpofition of both its Auricles and VefTels, how 
extraordinary foever it may appear, it is impoffible to 
find out the leaft thing which may injure the Opinion of 
Dr. Hnrvey , and all other Anatomifts, about the man- 
ner that the Bioud Circulates in the Heart of an Hu- 
man FcetH r, and the ufe of the Valve which is at the 
Foramen Ovale 5 which is, to permit the Blood to pafs 
from the Right Auricle through this Hole into the Left, 
and to hinder ^he Blood’s pafling from the LeftAuricie by 
this Hole into theRighr. And I add further, that amongft 
all the known Animals, one could not chufe one whofe 
Heart may be more proper to confirm this Opinion, 
than the Land Tortoife qf America , by reafon of the 
fimplicity of its Structure, and of the plain and diflinft 
manner in which all the Parts appear. Therefore there 
is room to hope, that if Mr. Mery would give himfelf 
the trouble to examine a fecond time the Stru&ure of 
the Heart of this Animal, with that Honefty and Can- 
dour he would make us believe he has, he will ac- 
knowledge his Miftake and Errors : But if after that, 
he perGfts ftill in his Opinion, I have done with him 5 
and (hall leave him to enjoy peaceably the agreable fatis- 
faftion he takes in his Opinion, and (hall not trouble 
my felf any farther, to convince him, or his Followers 
of their Error. 
