330 The Wisdom of GOD Part II. 



he hath endu'd the Bodies of fome of that Tribe 

 of aquatick Creatures with Lungs like viviparous 

 Quadrupeds, and two Ventricles of the Heart, 

 and an Ability of breathing like them, by draw- 

 ing in and letting out the open Air, fo contriving 

 their Bodies as to maintain in the midft of the 

 cold Water a degree of Heat anfwerable to that 

 of the fore-mention'd Quadrupeds. 



Another remarkable thing relating to Refpira- 

 tion is, the keeping the Hole or PalTage between 

 the Arteria Venofa and Vena Cava, call'd Foramen 

 ovale, open in fome amphibious Quadrupeds, viz, 

 the Phoca, or Vitulus Marinus, calFd in Rnglijlo, 

 Sea-Calf 2inA Seal -y and, as is generally held, the 

 Beaver too. We have already given the reafon of 

 the twofold Communication of the great Blood- 

 Veffels in the Fc^tiis or Young fo long as it con- 

 tinues in the Womb ; the one between the two 

 Veins entring the Heart, by a Hole or Window ; 

 the other between the two Arteries, by an arterial 

 Channel extended from the pulmonary Artery to 

 the Aorta, or great Artery ; which was, in brief, 

 to divert the Blood from the Lungs. Thefame 

 reafon for keeping open this Foramen ovale there 

 is in thefe amphibious Creatures. For, i. The 

 Lungs probably being not extended, but empty'd 

 of Air when they abide long under Water, and 

 flaccid, it is not eafy for the whole Blood every 

 Circulation to make its way thro' them. 2. To 

 maintain that degree of Heat. and Motion in the 

 Blood as is fufficient for them while they are un- 

 der 



