CHRONOLOGICAL TABLE. 113 



Fifth month. The two layers of decidua begin to coalesce. Osseous nuclei of axis and odontoid 

 process. Lateral points of first sacral vertebra ; median points of second. Osseous points 

 of lateral masses of ethmoid. Ossification of stapes and petrous bone. Ossification of 

 germs of teeth. Appearance of germs of permanent teeth. Eruption of hair on head. 

 Sudoriferous glands. Glands of B runner. Follicles of tonsils and base of tongue. Lym- 

 phatic glands. Commencement of limitation of uterus and vagina. 



Sixth month. Points of ossification for the anterior root of the transverse process of the seventh 

 cervical vertebra. Lateral points of second sacral vertebra ; median points of third. The 

 sacro-vertebral angle forms. Osseous points of the manubrium sterni and of the os calcis. 

 The cerebral hemisphere covers the cerebellum. Papillae of the skin. Sebaceous glands. 

 '''he free border of the nail projects from the corium of the dermis. Peyer's patches. The 

 walls of the uterus thicken. 



Seventh month. Additional points of first sacral vertebra; lateral points of third, median point 

 of fourth. First osseous point of body of sternum. Osseous point for astragalus. Pisap- 

 pearance of Meckel's cartilage. Cerebral convolutions. Insula of Reil. Separation of 

 tubercula quadrigemina. Disappearance of pupillary membrane. The testicle passes into 

 the vaginal process of the peritoneum. 



Eighth month. Additional points for the second sacral vertebra; lateral points for the fourth; 

 median points for the fifth. 



Ninth month. Additional points for the third sacral vertebra; lateral points for the fifth. 

 Osseous point for the middle turbinated bone; for the body and great cornu of the hyoid; 

 for the second and third pieces of the body of the sternum ; for the lower end of the femur. 

 Ossification of the bony lamina spiralis and axis of the cochlea. Opening of the eyelids. 

 The testicles are in the scrotum. 



