Colon of Men; and these Ligaments were accompanied with Veins and Arte∣ries which came from the Venae Mesentericae, and spread from space to space their branches into the Body of this Intestine.
Two fingers underneath the great end of the Spleen, there lay a little Sphe∣rical Body very extraordinary, which appeared of the same Substance as the Spleen, altho it was remote from it; It was three lines Diameter.
The other Intestines were so little different from one another, that we could never distinguish the Colon. They were near twenty eight foot long: Having opened them we found in the inside eight Worms long and round, like to Earth-worms, three whereof were between seven and eight inches long, and the rest about four.
The Spleen was laid along the left side of the Stomach, to which it was fastened by eight Veins, and as many Arteries, which made so many Vas Bre∣ve's. Its Colour was very Red: Its length seven inches, and its thickness almost equalled its breadth, which was about ten lines.
We observed nothing particular in the Liver, save that it was divided into five Lobes of the same Colour, as the Lobes of a Dogs Liver.
The Gall-Bladder was hid under the hollow part of the Liver between two of its Lobes. It was two inches and a half in length, and near an inch in breadth. All the lower Venter was overflowed with a diffused Choler, which had perhaps occationed the death of this Animal.
The Pancreas was nothing different from that of Dogs. Its length was ten inches, but it exceeded not two in its greatest breadth.
Though this Castor was very Fat, especially through the Belly and Tail, yet there was found very little in the Tunica adiposa of the Kidneys, and in the Epiploon. Each Kidney was an inch in thickness, near two in length, and as much in breadth at the middle.
The Cartilago Xiphoides was round, and fourteen lines broad; but very thin and pliable.
Having afterwards opened the Thorax we observed little difference between all the parts which were there inclosed, and those of Dogs. The Lungs had six Lobes, three on the right side, two on the left, and another little one which was in the Mediastinum near the Center of the Diaphragme.
That which was most remarkable in the Heart, is that the left Auricle was larger than the right; which is likewise seen in some other Animals, but not in Man, who on the contrary has the right Auricle of the Heart bigger than the left.
We the more carefully sought after the Foramen Ovale, which several Modern Authors have averred to be found in all Amphibious Animals, and even in Men, who do often dive and swim a long time in the water. But what exactness soever we used in the search, we could not discover that hole in the Heart of our Castor. It is true that as it had been several years penn'd up at Versailles, without having the liberty of going into the Water, it might be that this hole was closed up, even as it happens to the Foetus, after it is born, and has breathed sometime. Indeed it seemed that in this place there had formerly been a hole which was since grown up.
Under the Vena Coronaria we found the Valve called Noble, which fills the whole Trunck of the Vena Cava, and which was so disposed, that the Blood