NOTICES OF BOOKS. 29 



hybrid differs from the artificially raised one chiefly in the form of 

 the labellum and in the season of flowering." These artificial hybrids 

 requires from eight to nineteen years to arrive at the flowering stage, 

 so that we can scarcely hope to have the parentage of all the 

 supposed natural hybrids solved at present. Singularly enough, 

 2 of the artificially raised Cattleyas, and no less than 11 of the 

 Lcelias, were raised by crosses between the two genera ; a matter 

 which furnishes food for reflection as to why these bigeneric 

 hybrids should pertain to the former genus in the one case and to 

 the latter one in the other. They adopt Sophro-cattleya for a 

 hybrid between Cattleya intermedia. Why was not this hybrid 

 either a Cattleya or a Sophronitis ? Sophronitis and Lcelia are two 

 exactly parallel genera ; both have eight pollen-masses ; and 

 Cattleya differs from both in having but four. The fact is we have 

 either a true bigeneric hybrid in both cases or in neither. What is 

 sauce for the goose will have to be sauce for the gander, for 

 Sophronitis and Lcelia are both more disthiQt from Cattleya than 

 they are from each other. 



It seems a pity that the Messrs. Veitch should have commenced 

 a fresh pagination for the second part, as a consecutive pagination 

 of the volume would have been more handy for citation. A 

 considerable number of excellent woodcuts greatly enhance the 

 value of the work. E. A. Kolfe. 



The last part of the 'Icones Plantarum,' dated November, 1887, 

 contains the following new genera : — Polydragma Hook. f. (Euphor- 

 biacese, Crotoneae) ; Sphyranihera Hook, f, (Euphorbiacse) ; Scorte- 

 chinia Hook. f. (Euphorbias, Phyllan these ?) ; Megaphyllaa Hemsl. 

 (Meliacese, Trichilieaa) ; Lophoinjxis Hook. f. (Euphorbiaceas ?) : Petro- 

 cosmea Oliv. (Gesneracese, Cyrtandrese). 



a The Baron P. von Mueller has made some progress with the 

 third of the series of illustrated monographs with which, through 

 the liberality of the Victorian Government, he has been enabled to 

 enrich botanical literature. The iconography of Eucalyptus and 

 Myoporinem is now succeeded by an ' Iconography of Australian 

 species of Acacia,' of which four quarto parts, each containing ten 

 species, have been issued at the moderate cost of three shillings 

 each. The text is confined to an explanation of the plates, which 

 have been prepared by Mr. Robert Graff. The term indefat 

 has often been applied to Baron von Mueller, and we are glad to 

 see that it still remains one of his most striking attributes. 



New Books. — H. E. F. Garnsey & I. Bayley Balfour, 'Lectures 

 on Bacteria' (Oxford, Clarendon Press : 8vo, pp. xii. 193 : 20 cuts : 

 price 6s.). — L. Dosch, ' Excursions-Flora . . . des Grossher- 

 zogtunis Hessen' (Giessen, Roth, "1888": ed. 8, 8vo, pp. cviii. 

 616).— E. G. Camus, ' Catalogue des Plantes de France, de Suisse, 

 et de Belgique' (Paris, Dupont, "1888": 8vo, pp. vii. 825).— 

 A. Kerner, ' Pflanzenleben ... 1 Band, Gestalt und Leben der 

 Pflanze' (Leipzig: large 8vo, pp. x. 734: 20 coloured plates, 

 553 cuts).— E. Cosson, 'Compendium Florae Atlanticae,' vol. 

 (Kanunculaceae — Cruciferse) i Paris : 8vo, pp. cviii. 867). 



