192 



REVIEWS. 



A Manual of the Sub-kingdom Protozoa. By Joseph Reay 

 Greene, B.A. London : Longmans. 



We learn from the preface to this little volume, that it " is 

 the first of a series of similar treatises on the several depart- 

 ments of the animal kingdom ; " and from the cover of the 

 book we find that it is intended to herald a series of scien- 

 tific manuals. A manual of systematic botany is in pre- 

 paration by the distinguished professor of botany in the 

 University of Dublin. Professor Greene's work is a capital 

 commencement of the series. In beginning with the Pro- 

 tozoa, the author had a subject of some difficulty with which 

 to commence, but just such a one as an ardent and in- 

 dustrious student would be glad to deal. 



Mr. Greene does not stop to theorise, but, after a short 

 introduction on the general principles of zoology, he at once 

 proceeds to define the group Protozoa, which he makes to 

 include the following families : — 



1. Rhizopoda, 4. Thalassicollidte, 



2. Polycystina, 5. G?-egarinidce, 



3. Spongiadce, 6. Infusoria. 



All these groups are of especial interest to the micro- 

 scopist, and constitute, in fact, the great zoological field in 

 which he is called to labour. W r e cannot follow Professor 

 Greene through these groups to give his views of their con- 

 stitution, but we can cordially recommend the volume, as 

 giving by far the most advanced account that we know of 

 amongst manuals devoted to zoology. Although the author 

 shows that he is quite conversant with the recent literature 

 of Protozoa, the work bears indications of original inves- 

 tigation in many of the forms of animals to which it is 

 devoted. 



