494 ON GENERATION. 



fifth month of pregnancy, and may be pressed out of the 

 nipples, or it is like the drink which we call white posset. 



In the small intestines there is an abundance of chyle con- 

 cocted from the same matter; in the colon greenish faeces and 

 scybala begin to appear. 



I do not find the urachus perforate; neither do I perceive 

 any difference between the tunica allantoides or allantois, which 

 is said to contain urine, and the chorion. Neither do I detect 

 any urine in the secundines, but only in the bladder, where 

 indeed it is present in large quantity. The bladder, of an ob- 

 long form, is situated between the umbilical arteries as they 

 proceed from the bifurcation of the descending aorta. 



The liver is rudely sketched and almost shapeless, as if it 

 were a mere accidental part ; it looks like a red coloured mass 

 of extravasated blood. The brain, with some pretensions to 

 regularity of outline, is contained within the dura mater. The 

 eyes are concealed under the eyelids, which are as firmly glued 

 together as we find them in puppies for some short time after 

 birth, so that I found it scarcely possible to separate them and 

 open the eyes. The breast-bones and ribs have a certain de- 

 gree of firmness, and the colour of the muscles changes from 

 white to blood red. 



By the great number of dissections which I performed in the 

 course of this month, I was every day confirmed in my opinion 

 that the carunculae of the uterus perform the office of the pla- 

 centa ; they are at this time found of a reddish colour, turgid, 

 and of the size of walnuts. The conception, which had pre- 

 viously adhered to the caruncles by the medium of mucor or 

 glutinous matter only, now sends the branches of its umbi- 

 lical vessels into them, as plants send their roots into the 

 ground, by which it is fastened and maybe said to grow to the 

 uterus. 



About the end of December the foetus is a span long, and I 

 have seen it moving lustily and kicking ; opening and shutting 

 its mouth; the heart, inclosed in the pericardium, when ex- 

 posed, was found pulsating strongly and visibly ; its ventricles, 

 however, were still uniform, of equal amplitude of cavity and 

 thickness of parietes ; and each ending in a separate apex, 

 they form together a double-pointed cone. Occasionally I have 

 seen the fluid contained in the auricles of the heart, which at 



