490 BOTANICAL GAZETTE [JUNE 
beds (Upper Cretaceous) of Greenland. There are 4 species in 
the Oligocene of Southern Europe and 2 species in the Miocene 
of that continent. 
Leptospermum Forster, Leptospermites Saporta, and Lepto- 
spermocarpum Menzel have been identified from the Upper Creta- 
ceous and Tertiary of Europe. Tristania-like fruits have been 
described as Tristanites by SAPoRTA from the Lower Miocene of 
France and by Kitson from the Miocene of Australia. The 
genus Psidium Linn., with about 100 existing species in the West 
Indies and Mexico, is represented in Chile by an early tertiary 
species. 
It will be seen from the foregoing enumeration that the facts 
of recent distribution lend support to the thesis of origin which is 
put forward, and this conclusion is not negatived but supported 
to a considerable extent by the confessedly meager evidence avail- 
able in the geological record as at present known. 
Jouns Hopkins UNIVERSITY 
BALTIMORE, MD. 
