Bibliographical Notices. 395 



expected, since Dr. Fritz Miiller has been one of the foremost workers 

 in this field of research ; and not only have nearly all the facts here 

 brought forward been observed by himself, but of several of the most 

 curious and important of them he was actually the first discoverer. 



The additions made by the author to the new edition do not ap- 

 pear to be numerous. The most important, as indicated by the 

 translator, are: — a note on the metamorphoses and evolution of Insects 

 (at p. 119), in which the author supports the opinion that, of all 

 existing forms, the Orthoptera approach most closely to the primitive 

 Inseetean type, regarding the wingless Blattidae as the most typical 

 in their form ; and a hypothetical description at the end of the book 

 (pp. 135-140) of the mode by which we may suppose such forms as 

 the Rhizocephala (Sacculina, Peltogaster, &c.) to have been evolved, 

 on Darwinian principles, from some of the sessile Cirripedes. 



A History of British Sessile-eyed Crustacea. By C. Spence Bate, 

 F.B.S., F.L.S., and J. 0. Westwood, M.A., F.L.S. 8vo. London : 

 Van Voorst, 1861-1868. 



"We have already on several occasions called attention to the pro- 

 gress of this most valuable work during the long period over which 

 its publication has extended, and it is with much pleasure that we 

 have now to announce its completion. The work, as published, in- 

 cludes twenty-three parts, of which twenty-one are occupied by the 

 sequential descriptions of the genera and species. In the last two 

 parts the authors give us an Appendix containing descriptions of 

 species which have been detected on our shores during the progress 

 of their work through the press, a few supplementary notes on pre- 

 viously described species, and an introductory chapter containing a 

 general analysis of the structural and other phenomena presented 

 by the order. 



We now possess a natural history of the British species of the 

 great section of the Edriophthalmatous Crustacea, which, in com- 

 pleteness, in careful elaboration, and the beauty of its illustrations, 

 leaves little or nothing to be desired ; and it is to be hoped that the 

 existence of such an admirable guide may lead to a little more at- 

 tention being paid by our British naturalists to a department of 

 zoology which has hitherto been somewhat neglected. It is true 

 that in some respects these animals do not present such remarkable 

 peculiarities as the members of the other great divisions of their class, 

 the Podophthalmatous and Entomostracous forms, and especially the 

 Cirripedia and Bhizocephala ; nor are their characters so striking as 

 those of the higher species of the former order ; but many of them 

 are sufficiently interesting in their habits and mode of life to repay 

 the naturalist's study, whilst, from their typical position in the 

 class Crustacea, their investigation must always be essential to the 

 philosophical student of zoology. 



