202 
Dr. Stapf. These grasses with few exceptions are Tropical 
African species which Dr. Stapf had investigated in the course 
of his elaboration of the family for the “Flora of Tropical 
Africa” and descriptions of which have appeared in volume ix 
of that work. Two new genera are published: Diheteropogon 
(t. 3093) and Odyssea (t. 3100). Diheteropogon was treated by 
Hackel as a section of Andropogon, and Odyssea is nearest allied 
to Diplachne. Se Ack: 
The Useful Plants of Nigeria.—With the publication of Kew 
Bulletin, Additional Series [X, Part IV, Mr. Holland’s compilation 
of “'The Useful Plants of Nigeria, ” is brought to a close. The 
first Part published in 1908, and of which a notice was given in 
K.B., 1909, p. 427, gave a general introduction to the subject and 
detailed information of the plants comprised in the Natural 
Families Ranunculacae to Anacardiaceae. The second part, 
published in 1911, continued with the Anacardiaceae and con- 
cluded with the Araliaceae, The third Part, published in 1915, 
dealt with the Natural Familes Rubiaceae to Labiatae, whilst the 
present Part concludes the Dicotyledons, and covers the 
Monocotyledons, Filices, and Fungi. As an appendix to the 
last Part a list of books and papers dealing with West African 
subjects is given, and there is a complete index to all four Parts. 
With the fourth Part is bound an Introduction and Preface. 
In the Introduction Sir David Prain, under whose auspices the 
work was planned and carried through so successfully, gives the 
reasons which called for this publication. The Flora of Tropical 
Africa “which has occupied much of the attention of the 
Herbarium Staff at Kew for more than half a century, and the 
completion of which at last appears in sight,” provides a floristic © 
study. In West Africa no attempt had hitherto been made 
at an economic survey of the vegetation and it was to supply this | 
much-needed want that the present work was undertaken in 
the Museums at Kew. Mr. Holland’s Nigerian service has rendered 
him eminently suitable for this task, and although the work is 
primarily intended to cover Nigerian plants, it will be found 
equally useful for all West African countries 
olland in a brief Preface outlines the scheme followed 
“The Useful Plants of Nigeria,” to which he has devoted the 
sneaker part of his non-official work for the past sixteen years. 
The Parts have gradually increased in size, but it is chiefly the 
present greatly enhanced cost of production that has necessitated 
the very high price of the last Part. The published prices of the 
Parts are :—No. I, 2s.; No. II, 2s. 6d.; No. III, 3s. 6d.; No. IV, 
1l.; or the complete volume, Il. 8s. T. FE. & 
Plants.— Mr. M. T. Dawe, whilst on an official mission 
in the Gambia Colony on behalf of the Colonial Office early in 
