76 THE ZOOLOGIST. 



rather than over the end, and, as in some cases, the new part 

 may even appear in new tissue that covers the end, &c." The 

 word " regeneration " has therefore in biology " come to mean, 

 in general usage, not only the replacement of a lost part, but 

 also the development of a new whole organism, or even a part of 

 an organism, from a piece of an adult, or of an embryo, or of 

 an egg." 



In this book, which will be read with pleasure by all 

 zoologists, there are two prominent features : firstly, a very full 

 and complete exposition of the whole phenomena incidental to 

 regeneration, with which few can, and probably fewer still will, 

 cavil ; and secondly, a distinct challenge of the doctrine of 

 " natural selection." This last position in itself is a gain to 

 those who hold with Darwin's original conception, as distinct 

 from the new doctrine of some of his latest exponents. A theory 

 only ceases to be one when the last difficulty is overcome, and, 

 as Dr. Morgan well observes, " The custom of indulging in 

 exaggerated and unverifiable speculation bids fair to dull our 

 appreciation for hypotheses whose chief value lies in the possi- 

 bility of their verification." As an example of our author's 

 method in this discussion, which is throughout conducted in a 

 fair, logical and courteous manner, we may quote the following 

 sentences : — " All that natural selection pretends to do is to 

 build up the complete power of regeneration by selecting the 

 most successful results in the right direction. In the end this 

 really goes back to the assumption that the tissue in itself has 

 power to regenerate more completely in some individuals than 

 in others. It is just this difference, if it could be shown to 

 exist, that is the scientific problem." 



Insect Life: Souvenirs of a Naturalist. By J.-H. Fabre. 

 Translated from the French. Macmillan & Co., Ltd. 



We recently had the pleasure of drawing our readers' atten- 

 tion to a book entitled ' Bird-Watching ' ; this publication 

 might with equal felicity have been called " Insect- Watching," 

 for both volumes are the result of bionomical observation. The 

 author, estimated by Darwin as "that inimitable observer," is 

 widely known by his ' Souvenirs Entomologiques,' of which there 



