MR. 8. KURZ ON A NEW GENUS OF MORACER. 167 
In the first four columns of the above Table the number of 
flowers fertilized and the total number of capsules and seeds 
produced are shown; in the fifth column I have given, by a 
careful microscopic examination in each case of 1000 seeds, the 
relative number of embryonated seeds produced; and lastly, in 
the column at the right hand, for facility of comparison, the 
exact number of good seeds produced per 1000 of the total 
product is given. 
By a summary comparison of these results we have the following 
highly interesting facts disclosed. First, we see that the male 
element of O; microchilum (No. 1) will fertilize the female 
element of the two distinct species, O. ornithorhynchum and O. 
divaricatum cupreum, and yet be completely impotent upon its 
own female element; nevertheless the susceptibility of the latter 
(female element) to fertilization is shown by its fertile unions with 
another individual of the same species, and likewise by a fertile 
union with an individual of a distinct species, namely, O. divari- 
catum cupreum. Secondly, the male element of O. mierochilum 
(No. 2) will fertilize the female element of O. ornithorhynchum 
and O. divaricatum cupreum, and likewise another individual of 
its own species, though on its own female element it is utterly 
ineffective. ; 
On a New Genus of Moraceae, from Sumatra and Singapore. By 
Mr. Saupeiz Kuk%, Curator of the Herbarium of the Botanic 
Gardens, Calcutta. With a Note by Dr. Anperson. Com- 
municated by T. AxpEusos, M.D., F.L.S. 
[Read June 2, 1864.] 
[Prare XIII.] 
Tue plant, of which a generic diagnosis and a specific description 
are appended by Mr. Kurz, the newly appointed Curator of the 
Herbarium of the Calcutta Botanic Gardens, is an imperfectly 
described species, which yields some of the valuable timber known 
as Iron-wood in the Dutch East Indian Possessions. 
Messrs. Teijsmann and Binnendyk, in describing another tree, 
Eusideroxylon Zwageri, T. et B., which produces Iron-wood (vide 
Tydsehrift voor Nederl. Indie, 1863), enumerate the species 
known to them to afford the same class of timber. These are, 
Eusideroxylon Zwageri, T. et B.; Namia vera, Miq.; Intsia Am- 
boinensis, Thouars; Cassia florida, Vahl; Memecylon ferreum, 
Blume; Stadmannia Sideroxylon, DC.; Dodonea Waitziana, 
