NEW BOOKS, WITH SHORT NOTICES. 151 



devoted to tliem. And certainly we think the work is very excellently 

 done. Doubtless some will say it is not sufficiently minute, but we 

 venture to think that an article which deals with the entii-e subject 

 should avoid specialities and deal more with generalizations. And 

 this is what we find in this contribution. The author first gives a 

 general account, and then proceeds to deal with the integument in 

 which the outer cuticle, the carapace, the cortical layer, and its peculiar 

 thread-cells are minutely described ; then the locomotive organs, under 

 which heading are detailed thevaiious forms, such as cilia, flagelliform 

 filaments, retracting cilia, setce, styles, and uncini ; then the nervous 

 system, under which are related the various indications of a nervous 

 arrangement, although no traces of it have been yet distinguished ; 

 and likewise the circulating, the digestive, and the reproductive 

 systems, especially the last, are minutely described. In the next 

 place their diffusion is spoken of, and a very full account of the syste- 

 matic classification is given. Under this latter head the two systems, 

 those of M. Dujardin on the one hand, and of MM. Claparede and 

 Lachmann on the other, are given, and finally the bibliography which 

 concludes the paper is as full as needs be. 



The next subject that we may refer to is that of Injection, which is 

 by no means so novel as we should have anticipated. The part devoted 

 to the opaque injection fluids is of course very good, but that which 

 describes the difterent transparent liquids which are now almost 

 exclusively used for preparations, is meagre and short ; and in the re- 

 ferences to books on the subject, one of the very best, as well as the 

 cheapest books, viz. that of Davies, is, we observe, omitted. The descrip- 

 tion of the method of performing the operation is extremely fully given, 

 and this is a point of some imiwrtance, for there is no subject in which 

 the young microscopist is more liable to fall into errors. We observe 

 that the authors have described an apparatus for injection which per- 

 forms its own work, thus leaving the hands free for the purpose of 

 stopping any escai^e of the fluid, &c. This may doubtless prove 

 useful in some cases, and it can be readily put up by any ingenious 

 person in the course of half-an-hour. Next in order we come to the 

 Intestinal Canal, which has not been very much brought up to the 

 time, although it is very good, and well illustrated. The bibliography, 

 so far as it refers to Verson and E. Klein, is good, but the succeeding 

 reference we do not quite understand, the more so, as the title given is 

 really that which should have followed MM. Verson and Klein. The 

 other i^apers in the thirteenth part to which we would call attention 

 are those on Isoetes, on the Kidney, on Lagena, on Lar, which is a little 

 too brief, and on Lepisma, which, considering the importance of the 

 Thysanura to the microscopist, is far too shortly given. 



In the fourteenth part the best contribiitions are undoubtedly those 

 on Lichens and on Liverworts. These are unquestionably well and 

 fully executed, and further the reader has given him a succinct account 

 of the more modern ideas regarding the supposed algoid and fungoid 

 relationship of these plants, while in regard to their structure and 

 development the subject is as recent as possible. Ligaments is a fair 

 paper, not however extremely recent, and its bibliography, unlike that 



VOL. XII. M 



