OF THE FOETUS. 315 



legs ; and the fingers feparate fooner than the 

 toes. The internal organization now begins to 

 be vifible : The bones appear like fine threads. 

 The ribs are dilpofed on each fide of the back- 

 bone like minute threads: The arms, the legs, 

 the fingers and toes, are alfo reprefented by fi- 

 milar threads. 



At one month, the foetus is more than an 

 inch in length: It naturally aflumes a curved 

 pofture in the middle of the liquor that fur- 

 rounds it; and the membranes in which the 

 whole is included, are both augmented and 

 thickened. The whole mafs is of an oval figure, 

 the greateft diameter of which is about an inch 

 and a half, and the leall about an inch and a 

 quarter. The human figure is no longer equi- 

 vocal : All the parts of the face are already 

 diftinguifhable; the body is delineated; the 

 haunches and the belly are prominent; the 

 liands and legs are formed, and their fingers and 

 toes are divided ; the fkin is thin and tranfpa- 

 lent ; the vifcera relemblc a knot or plexus of 

 fibres; the velfels are like fine threads, and the 

 membranes are extremely delicate: I he bones 

 are ftill fofr, and it is in a few places only that 

 they have begun to alTume fome degree of ioli- 

 dity. The vcflels which form the umbilical cord 

 lie parallel to each other in a ftraight line. The 

 placenta now occupies only a third of the whole 

 mai's, inftead of a half, which it did during the 

 jirfldays; the fuperficial growth of the placenta, 



therefore, 



