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much better placed in Macaranga) and possibly the very dissimilar 

 C. verticillatum, is a natural and well-characterized genus of few 

 widely dispersed species. We have 3 or 4 American and 8 or 9 

 Old- World species, viz. C. tricoccum from Brazil, 2 (of which one 

 unpublished) from Peru, and possibly 1 from Central America, 

 1 (or perhaps 2) from tropical Africa, 1 from tropical Asia, 1 from 

 the Fiji Islands, and about 6 from New Caledonia. The nearest 

 affinities of the genus appear to be with the Old- World Mallotus 

 and Macaranga. 



Clicetocarpus, which should probably include Mettenia, is a very 

 distinct genus, with an unusual geographical range : 4 or 5 species 

 (if we include Mettenia) are tropical American ; and 2, differing 

 only by a very unimportant common character from the American 

 ones, are Asiatic, ranging from Ceylon and the Peninsula to the 

 Malayan archipelago ; and there are no African affinities, unless 

 we seek them in some genera of Phy llantheae, where one would be 

 tempted to place Chcetocarpus were it not for the uniovulate cells 

 of its ovary. 



Plukenetia, Dalechampia, aud Tragia (three genera evidently 

 allied to each other) have also a nearly similar geographical range 

 over the New and the Old World, with more or less of an Ameri- 

 can preponderance, the first two having only a very few African 

 or Asiatic species, Tragia more equally divided and extended. 

 Plukenetia, with 8 American and 5 Old- World species, has been 

 divided into several sections or separate species considered di- 

 stinct enough to have substantive names. The principal section 

 Pterococcus has 2 American, 2 African, and 1 Asiatic species ; the 

 other sections are all monotypic — Eupluleenetia, Cylindrophora, 

 Fragariopsis, and Anabaina in America, Angostylidiwn in Africa, 

 and probably Sphcerostylis in Madagascar, also two perhaps rather 

 more divergent unpublished American species. All are confined 

 to the tropics. Tragia has about 50 species nearly equally di- 

 vided between the New and the Old World, one, T. volubilis, 

 being common to the two. The genus has not yet been divided 

 into good natural sections, although a few American or Masca- 

 rene species have been singly, or almost singly, separated from 

 the mass upon characters of minor importance. The species are 

 mostly tropical, extending, however, southward in Africa to the 

 Cape, and northward in America to the United States ; they are 

 numerous in America and Africa, few in Asia, and only one is in 

 Australia. Among the nearest allies of the genus, independently 



