426 DR. C. F. SONNTAG ON THE ANATOMY, 



The lymphatic system is characterised by a doubling of the 

 thoracic duct ; and the groups of glands are much fewer than in 

 Man. 



The ductless glands generally resemble those in Man. But 

 the thyroid is a long, narrow U-shaped organ instead of being 

 composed of an isthmus and two lateral lobes. The vascular 

 supply is interesting in my specimen, but I am unwilling to 

 regard it as the normal condition till other material becomes 

 available for examination. 



The lungs are divided into the same number of lobes as in 

 Man, but they are subdivided differently. The trachea and 

 bronchi are as in Man, but the larynx differs in some points of 

 structure, and in the possession of a large air-sac. Vrolik has 

 shown that they ai-e largest in the aged, and it is possible that 

 this fact is correlated with weaker muscles at that period of 

 life. 



The external generative organs have already been alluded to. 

 The internal organs are built on the same plan ; but the round 

 ligaments are relatively much thicker than in the human 

 condition. They may play a more important part in fixing the 

 uterus than they do in woman. The vestibule is very small, and 

 the meatus urinarius opens within the vagina. 



It is sometimes stated that Man and Ateles are the only 

 Primates which possess more than one renal papilla. But that is 

 not the case, for I have seen kidneys of Chimpanzees with three 

 to six papillae. The left renal a,rtery is peculiar in rpy specimen 

 for it anastomoses with lumbar arteries, whereas the renal 

 arteries are end-arteries in Man. 



In its origin from tiie femoral artery, and its course up 

 through the femoral sheath the obturator artery in my specimen 

 courses as in one form of abnormality in Man. 



Man differs from the Chimpanzee in being bimanous and 

 bipedal, and in the possession of those higher mental powers 

 which we designate by the name of the Soul. 



Bibliography. 



1. Alix, E. — Annales des Sciences Nat. ser. 5, t. viii. p. 295; 



t. ix. p. 5. 



2. Barkow, H. — " Comp. Morph. des Mensch. v. der Men- 



schahnliche Tiere." Breslau, 1863. 



3. Beddard, F. E.— Trans. Zool. Soc. London. 1892, vol. viii. 



pp. 177-218. 



4. Bland-Sutton, J. — Journal of Anatomy and Physiology, 1884, 



pp. 66-85. 



5. BoLAU, H. — Abh. aus dem Gebiete der Naturwiss. Hamburg- 



Altona, 1876. 



6. BoLK, L.— Lancet, 1921, pp. 588-592. 



7. „ Morphol. Jahrb. xxv. pp. 306-361. 



