302 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
flora of the island. Forty-two new species, including two new genera, 
have been discovered on the island. 
The vegetative conditions of Margarita are much more varied than 
those of the other islands. Margarita has both a rich mountain flora 
and also the flora of arid plains and hills. Cura9oa and the others 
possess only arid vegetative conditions. 
In regard to the comparison of the flora with that of adjacent re- 
gions, it is much to be regretted that data are so insuflficient as to lessen 
the value of any comparison and in some cases actually to prohibit it. 
The flora of IMargarita comprises all the plants found on Coche wdth 
three exceptions. The other small islands are probably similar in this 
respect. La Tortuga has twenty-three out of sixty-nine plants not to 
be found on Margarita and Los Roques has four out of twenty-eight 
not on Margarita. Though it is impossible to speak accurately of 
Cura^oa, to judge by the references cited on previous pages there are 
about four hinidred plants there of which one hundred are not on 
Margarita. 
Although there is a large list (240) of plants of IMargarita not ]3ub- 
lished as occurring in Venezuela, it is probable that a large proportion 
of them do. The vegetation on the mainland (near Carupano and 
Cumana) opposite Margarita is identical in appearance with that of 
IMargarita. 
Trinidad has a very large flora, yet over two hundred IMargaritan 
plants have not been reported from there, and are not in the Herbarium 
of the Trinidad botanical gardens. 
The entire chain of islands to the east of the Caribbean Sea possesses 
a vegetation consisting of many species not to be found on IMargarita. 
It is of a much more luxuriant character. In the extensive flora of 
Porto Rico so far as can be ascertained there are less than one hundred 
IMargaritan plants to be found. Most of these are common to the 
American tropics. 
In the flora of the Cayman islands it is seen that out of their two 
hundred and twenty-eight species only eighty-four are on IMargarita. 
The reference to the plants of the southern United States similarly 
shows about a hundred from Margarita which are, however, cosmo- 
politan. 
In the comparison of the flora with that of other regions about the 
Caribbean Sea it is evident that the flora of Margarita is largely com- 
posed of plants common to many parts of the American tropics. It 
