188 ZOOLOGY. 



divided vertically with a saw into two equal parts. Gerdy has 

 shown that Camper's views have been wholly mistaken by nearly 

 all subsequent writers. These are physiological questions, con- 

 nected more with philosophic and transcendental anatomy than 

 with the descriptive anatomy of adult man, the main object of 

 this work." From the Manual of Human Anatomy, by Dr. 

 Knox. London : 1843.] 



[Many later systems of cranial admeasurement have been 

 proposed since the time of Camper. The line proposed by the 

 Abbs' Frere, drawn from the junction of the coronal and sagittal 

 sutures to the meatus, is often used as the perpendicular line. 

 Another perhaps more convenient method, adopted in this work, 

 is the horizontal line which is drawn from the glabella to the 

 occipital protuberance. The true axis of the skull, however, is 

 the longitudo racheos of Von Baer, a line drawn through the 

 centres of the various cranial vertebrae. Professor Huxley con- 

 siders the basicranial axis to be the line drawn from the anterior 

 margin of the foramen magnum to the anterior extremity of the 

 presphenoid bone. C. C. B.] 



END OF PART I. 



