EMBRYO OF FOUR MONTHS. 



157 



position of the limbs is typical for this age, but there are slight variations, in that 

 the hands, one or both, may project more and be higher or lower; usually the right 

 foot lies in front of the left, but not always. Figure no gives the front view of 

 the face of the same embryo to show the closed eyelids, the broad triangular nose, 

 the thick lips, and the pointed chin. 



Embryos of Three and One-half Months, 108 to no mm. I have several speci- 

 mens which represent this age. Two 

 of them are figured, one to show the 

 natural attitude (Fig. in) in utero, 

 the other (Fig. 112) to show the 

 natural attitude assumed by the em- 

 bryo when released from its mem- 

 branes. The first specimen came to 

 me with no history, but as it is cer- 

 tainly a little larger than several other 

 fetuses of about one hundred and six 

 days, it is probably a little older. 



FIG. 109. HUMAN EMBRYO OF 78 MM. THREE 

 MONTHS. NATURAL SIZE. 



.Fie. no. FRONT VIEW or THE FACE OF THE EM- 

 BRYO SHOWN IN FIGURE 109. NATURAL SIZE. 



The head is bent forward (Fig. in); the back is curved; the arms and legs are both 

 raised toward the face; the right leg is nearly straight, so that the toes are brought 

 against the forehead, while the left leg is bent at the knee, bringing the left foot 

 against the right thigh. In this attitude the embryo fills out as perfectly as possi- 

 ble an oval space, and fits, therefore, the cavity of the uterus. The second speci- 

 men (Fig. 112) shows the attitude assumed by the embryo when free, and proves 

 that the position in utero (Fig. in) is a constrained one. This fetus was received 

 November 30, 1883. The delivery took place on the morning of that day, and the 

 last menstruation had ceased one hundred and six days previously; the remarkably 

 fresh condition of the fetus indicated that it had been dead only a very short time, 

 so that we cannot be far wrong in putting its exact age at one hundred and six days. 



Embryo of Four Months, 155 mm. The fetus shown in figure 113 came in a 



