1 Journal of Comparative Neurology. 



morphological plan identical with the apparently dissimilar Macropus. 

 The mesal olfactory fossa is absent but it does not appear whether this 

 is correlated with any peculiarity of the Jacobson's organ. 



The pyriform lobe takes an increasing share in the formation of 

 the lateral part of the hemisphere as the extent of pallium decreases. 

 The region reaches the height of its development early in ontogeny and 

 phylogeny, hence its surface always remains smooth. Herrick and 

 Bawden are criticised for confusing of the hippocampus when they 

 evidently mean the pyriform but this criticism apparently rests on a 

 misapprehension. The tuberculum olfactorium is of great size. Hill's 

 usage in excluding this body (the post-rhinal lobe) from the rhinenceph- 

 alon is characterized as "ridiculous" — an expression which must be 

 accepted as applying to the critic's risibihties alone and which over- 

 steps as a personal reflection the limits of professional courtesy. The 

 author evidently meant "preposterous" or "inconsistent" but this 

 must depend on the morphological extension involved in the term 

 rhinencephalon. 



Additional illustrations are given presumptively in favor of the 

 view that the " commissura paUii anterior " is not a callosum, but inci- 

 dentally illustrating the long-questioned fact that there are two dorsal 

 commissures in marsupials, which, after all, has been that chiefly in 

 the minds of the writer and others who have sought to enforce the 

 distinction between the hippocampal and callosal portions of the dorsal 

 commissure. 



The reader may seek the original for a variety of details and 

 generalizations. 



The illustrations are far from successful. c. L. H. 



Romanes on Weismannism. ^ 



This new edition of the " Weismannism" is well printed and fur- 

 nished with an excellent portrait of the author. It is one of the few 

 really good cheap books which stand in so marked contrast with the ten- 

 dencies of the time in book making. We have already noticed an earlier 

 edition, but would again call attention to this discussion of the theories 

 which Weismann has erected on the basis of his fundamental postulate 

 of the non-inheritance of acquired, or somatic characters, as assuming 

 a new importance in the light of the more recently pubhshed work of 



' An Examination of Weismannism. By George John Romanes. Chicago, 

 The Open Court Publishing Co., 1896, Price 35 cents. 



