3G4i Bibliographical Notices. 



whole genus in time is thus made evident. The student is recom- 

 mended to take each group of animals as indicated by the curved or 

 vertical lines of separation* by itself, as the object of the Chart is 

 to show him how each tribe or order has been gradually developed 

 and perfected, or otherwise, in its course. By taking, then, the 

 genera and species belonging to the lowest formation first, he will 

 tlie more readily see what changes have been introduced among a 

 particular set of animals ; and having made himself thus master of 

 the separate groups, he will be able afterwards better to see their 

 mutual relations." 



Genera Plantarum: auctoribus G. Bentham et J. D. Hooker. 

 Vol. i. Pars 2. London, 1865. 



We have much pleasure in announcing the publication of another 

 Part of this admirable work. It consists of 293 pages, and contains 

 the genera included in the orders Leguminosoe, Rosacea), Saxifragese, 

 Crassulacese, Droseracese, liamamelidese, Bruniacese, Haloragese, 

 Rhizophorese, Combretacese, and Myrtacea) ; and we are informed 

 that a third Part will complete the Polypetalous orders and the first 

 volume. It is much to be desired that no great delay may attend 

 its publication. 



It is scarcely possible to give any idea of the amount of labour 

 which has been expended upon this work, which must form a neces- 

 sary part of the library of every botanist. We have looked rather 

 hastily through the present part, and observe very few points re- 

 quiring notice. In Leguminosce the Genistesc, Trifoliese, and Lotcoe 

 are regarded as tribes of the Papilionacefe, and of equal rank with 

 Viciese and Iledyracese ; and, amongst the genera, Sarothammis is 

 combined with Cytisus, Arthrolobium with Ornifhopus, Ervum is 

 joined to Vicia, and Orobus to Lathyrus. The order Rosaeeae is 

 retained entire, notwithstanding the apparently epigynous structure 

 of the Pomeie. Amongst its genera, Potentilla includes Sibbatdia, 

 Ayrimonia includes Aremonia, Poterium includes Savguisorba, 

 Pyrus includes Mespilus. The Grossulariaeese are combined with 

 the Saxifragese, and also the genus Parnassia. The genus Calli- 

 triche is placed in Haloragese, but Ceratophyllum is considered to 

 constitute a Monochlamydeous order. 



There are many other alterations made in the usual mode of 

 grouping, but we do not think it necessary to mention them. 

 Those enumerated are of the most interest to the British botanist, 

 as relating to the flora of his own country. 



We have only to add that all botanijrts must feel anxious for tlie 

 early continuation o*f this very useful work, and exf)ress our hope 

 that its sale may be such as to encourage the learned authors to 

 proceed as rapidly with its publication as they properly can. 



* The grou])s may be made more distinct by colouring the lines by 

 different paints or crayons. 



