64 REVIEWS. 



they are very apparent. ►Thus, the specific term " pervonia" is applied (p. 

 405) both to the sirex and the butterfly, which are figured on that page. The 

 printer of the French work has, at p. 240, given the figure of a breeze-fly, 

 instead of that of the carpenter-bee. The error has been faithfully copied 

 in the English translation : we are there presented with the nest of the 

 carpenter-bee ; but the two-winged insect is figured as its builder, with the 

 name " Xylocope" (carpenter-bee). 



Dr. Knox has introduced — either in the text, or as foot-notes — various 

 extracts from, or references to, his own published works. There may be 

 a difference of opinion whether the book has been improved or not by these 

 additions. Into this question we do not propose to enter. We have 

 examined the work merely as a translation, and are sorry to say that as such 

 it does not do justice to the original, while it contains many blemishes 

 which a little research, and a very moderate amount of revision, would have 

 excluded. We doubt not that these amendments will be made accordingly ; 

 and the volume will then be an useful auxiliary to other books treating of 

 kindred subjects, which have been " introduced" years ago among our re- 

 cognized school-books. The careful translation of any foreign work of emi- 

 nence shall ever be regarded by us with favour ; and we hope to have many 

 of them communicating to us the facts observed by our continental brethren, 

 and the significance of those facts, as they appear to reflective and educated 

 minds. 



R. P. 



Wahre Parthenogenesis bei Schmetterlingen und Bienev 



ein Beitrag zur Fortpflanzungsgeschichte der Thiere. 



Von C. Th. E. von Siebold. 8vo. Leipzig. 1856. 

 On a true Parthenogenesis in Moths and Bees, a Contribution 



to the History of Reproduction in Animals. By C. Th. 



E. von Siebold ; translated by W. S. Dallas, F.L.S., &c. 8vo. 



Van Voorst. London. 1857. 



Professor Owen, the author of the term Parthenogenesis, has defined it as 

 procreation without the immediate influence of the male. The examples 

 given are spontaneous fission, gemmation, development from germ-cells and 

 germ-masses, or from unimpregnated ova. The term has been readily 

 adopted by other physiologists, and some have extended the application of 

 it to the analogous phenomena in the vegetable kingdom. Siebold, on the 

 other hand, proposes to confine it to the last-named of the above cases. 



