THe Nervous System of 



Vertebrates 



By J. B. Johnston, Ph. D. 



Professor 0} Zoology in West Virginia University. 



With 1 80 Illustrations, the majority from original drawings. 

 Octavo; xx+37o pages. Cloth, $3.00 net. 



THE attempt has been made in this book to give an account of the nervous 

 system as a whole, to trace its phylogenetic history and to show the fac- 

 tors which have determined the course of evolution. The functional point 

 of view, which is the chief characteristic of the present book, brings the treat- 

 ment of the nervous system into close relation with the work of recent years on 

 the behavior of animals. The study of behavior aims to give an account of the 

 actions of animals in relation to the environment. The study of the nervous 

 system aims to describe the mechanism by which actions are directed and 

 adapted to the conditions of life. A text-book of comparative neurology at the 

 present time must meet the needs of workers of all grades, students, investi- 

 gators and instructors. Its descriptions should be intelligible to students who 

 have had one year of work in zoology or medicine, including the anatomy and 

 embryology of some vertebrate. On the other hand, there should be included 

 all facts which are important for the functional and phylogenetic mode of treat- 

 ment. Every effort has been made to bring out clearly the functional significance 

 and relationships of the structures described, and to interest and train the 

 student in the interpretation of structure in terms of function, adaptation and 

 evolution. The (BNA) terms, which are now the most generally familiar, have 

 been employed so far as possible. Much material has been collected which is 

 published here for the first time. 



Two prominent instructors sayt 



"It is an exceedingly useful piece of work, well done." "Profes- 

 sor Johnston's text-book makes a valuable addition to our researches 

 and represents the newer developments of neurological science in a way 

 which, so far as I know, no other book has even attempted." 



Synopsis of Contents : Study of the Nervous System. General Morphol- 

 ogy of the Nervous System. Development of the Nervous System. Nerve Ele- 

 ments and their Functions. The Functional Divisions of the Nervous System. 

 Somatic Afferent Division; General Cutaneous Subdivision; Special Cutaneous 

 Subdivision ; Visual Apparatus. Visceral Afferent Division. Olfactory Appar- 

 atus. Somatic Motor Division. Visceral Efferent Division. Sympathetic 

 System. Centers of Correlation. Cerebellum. Centers of Correlation; Mesen- 

 cephalon and Diencephalon. Evolution of the Cerebral Hemisphere. Neopal- 

 lium. Bibliography and Laboratory Work Suggestions at end of each Chapter. 



