74 



[June, 1846. 



or six lines, and possesses a decided vascularity. The chorion is connected to 

 the decidua by its shaggy surface, but an amnion is not distinguishable, being 

 probably not yet formed. 



Passing from the sides of the cavity of the chorion, is a delicate cellular tissue, 

 filled with a transparent serous fluid, the corpus reticulare, in which the embryo 

 is suspended by the duct of the allantois and vessels to the upper part of the 

 chorion, at the point where the future placenta is formed. The embryo, in its 

 curved position, measures six lines in length, and exhibits the cerebrum, cere- 

 bellum, chorda dorsalis, the rudimentary vertebne, ribs, and extremities, and 

 the heart, the liver, the stomach and urinary bladder. 



Conceiving the pregnant uterus at this stage to be of more than ordinary 

 interest, I present the following figures of the same as it appeared on dissection. 



Fig. 1. 



Fig. 1, Represents the uterus laid open, the size of nature, exhibiting : 1, The 

 decidua; 2, The chorion; 3, The corpus reticulare; 4, The embryo. 

 Fig. 2. 



Fig. 2, Represents the embryo, twice the size of nature. 



1, The cerebrum; 2, The cerebullum ; 3, The chorda dorsalis; 



>A 4, The rudimentary vertebrae; 5, The ribs; 6, The extremi- 



ties; 7. The heart; 8, The liver ; 9, The stomach; 10, The 



v a urinary bladder. 



