VI TEANSLATOK S PREFACE. 



nervous system and the sympathetic system have been re- 

 written. The description of the arteries of the brain is 

 entirely new, while the chapters on cranial and spinal nerves 

 have received many smaller additions, and have been re- 

 arranged to facilitate reference. 



Sect. IV. The Vascular System. The chapter on the heart is 

 practically new, and many additions and alterations have 

 been made in the descriptions of the blood-vessels and 

 lymphatics. 



Sect. V. The Alimentary Canal, with its appendages, the Spleen 

 and the Peritoneum. In this section much new material has 

 been added : the descriptions of the blood-vessels of the liver, 

 the ducts of the liver and pancreas, etc., being the results of 

 original investigation. 



Sect. VI. The Respiratory Organs, the Thymus and Thyroid 

 Glands. These organs have been carefully studied and 

 numerous new details are noted. The lymphatic glands of 

 the hyoid region have, after some hesitation, been designated 

 tonsils. 



Sect. VII. The Uri no -Genital Organs. A very large number 

 of preparations have been made to investigate the vessels and 

 uriniferous tubes of the kidneys ; and the descriptions of 

 the remaining organs of this section have received large 

 additions from recent publications. 



Sect. VIII. The Skin and the Sense-Organs. This section has, 

 with the exception of very small portions, been re- written and 

 very much enlarged. 



Before concluding this preface, I must thank my friend Professor 

 A. Milnes Marshall, of the Owens College, for all the help and 

 kindness he has extended to me before and during the time this 

 work has been in hand ; to him I am indebted not alone for the 

 loan of books, pamphlets, etc., and for much useful information, 

 but also for the care and patience with which he has read and 

 corrected the whole of the proof-sheets. 



To Professor G. Lunge, of Ziirich, I am indebted for the use of 

 the library of the Gesellschaft der Naturforscher of Zurich ; and 



