u Journal of Comparative Neurology. 



tisfactory. One matter calls for especial notice. The author has en- 

 deavored to apply topographical terminology, especially in the naming 

 of tracts. Thus we have tractus tegmenio-cerebellaris, tractus tecto-bul- 

 baris, employing a principle long in vogue in the nomenclature of 

 muscles. Of course, in many cases the ultimate origin and destina- 

 tion of a tract remain in doubt and in some instances a name can 

 only be tentative. On the other hand the convenience of employing 

 a name which is also descriptive is obvious. There will be a differ- 

 ence of opinion respecting many points in the terminology used but, 

 without being in any sense radical, the tendency of the usage is dis- 

 tinctly toward consistency. We regret, for example, that the term 

 sulcus and fissura are both employed upon the cerebrum and that fo- 

 lium is not given a generic instead of specific application in the cere- 

 bellum. We object to the use of the term valvula for the volvula 

 cerebelli in fishes and of torus semicircularis for coUiculus. There 

 seems at times to be ambiguity in the use of the terms lobus olfactor- 

 ius, area olfactoria, spatium olfactorium parolfactorius and lobus pyri- 

 formis. We are not satisfied that the homology of the axial lobe of 

 lower vertebrates with the striatum is sufficiently clear to apply the 

 latter term in those groups, and there are numerous moot points which 

 only the combined efforts of many investigators can settle ; but this 

 fact does not detract from our appreciation of the value of this first 

 successful attempt to lay the foundation for a homogeneous science 

 of neurology. 



The third part, while less altered than the other chapters, is 

 largely rewritten and is supplied with new illustrations. The portion 

 relatmg to the development of the olfactory organs and their function 

 is familiar to our readers but is expressed with more conservatism than 

 in earlier papers. There are several points in the earlier edition from 

 which the author retreats or withholds judgment. We agree with him 

 that there is insufficient proof that the entire gyrus fornicatus has an 

 olfactory function. As to the homology of the psalterium with both 

 cephalic and caudal mantle-commissures we await farther developments 

 with interest. 



Some readers will miss the final paragraph on methods from the 

 present edition but it is evident that the book has nearly reached the 

 upper limits for a one-volume text-book and the modern histological 

 technique can hardly be satifactorily treated in a chapter. Much as 

 we dislike the term "epoch-making" the present edition certainly 

 does mark the beginning of the comparative epoch in neurology. 



c. L. H. 



