cxlviii Journal of Comparative Neurology. 



is as before clear and usually satisfactory. The statement on page 

 58 that all marsupials so far studied lack a callosum ignores the de- 

 scription of it by Osborn and the writer. [See elsewhere in this num- 

 ber.] The treatment of the olfactory apparatus and limbic lobe is a 

 decided advance over any anatomical discussion so far. 



The new portions on che thalamus are especially valuable and are 

 elucidated by the new figures 66, 67, 69, 70 very satisfactorily. The 

 author has seen no reason to admit a recently advocated idea that the 

 cerebellar functions are chiefly sensory. 



The discussion of the medulla has been completely remodeled and 

 the result of the phenominal activity in the study of this region are 

 largely included. 



The last chapter is devoted to a very brief discription of the 

 technical methods of studying the nervous system. 



While the exigencies of publication do not permit as careful a re- 

 view as the work deserves we can give it the warmest praise and con- 

 sider that it will prove a necessity to every neurologist whether he has 

 access to the earlier editions or not. 



KoUiker's Histology, Sixth Edition.' 



The part of this well known work relating to the nervous system 

 has been awaited with a degree of impatience, for it has been evident 

 from numerous occasional papers that the distinguished author has 

 been giving himself to the cultivation of this special field by the re- 

 cent technological methods with marked diligence and his usual suc- 

 cess. The papers in the Zeitschrift f. wiss. Zoologie during the last 

 few years have been among the most beautiful illustrations of the pos- 

 sibilities of the Golgi method. The present instalment of 372 pages 

 includes but half of the nervous system, including a discussion of the 

 medullated and non-medullated fibres, nerve cells in general, the 

 spinal cord, medulla and cerebellum. 



The work begins by presenting the neuron theory, thus revealing 

 on its first page the tendency of the whole. Professor KoUiker, how- 

 ever, discards the word neuron from linguistic reasons and substitutes 

 " neuro-dendridien " (neuro-dendrits), which is open to a still greater 

 objection that not all neurons are provided permanently with den- 

 dritic processes. 



The sympathetic system is not seperated from the "animal" 



1 KoELLlKER. A. Handbuch der Gewebelehre des Menschen. Wilh. 

 Engelmann, Leipsig, 1893. 



