It is perhaps too soon to assert that there is only one species of the present genus in Puerto Rico. The trees certainly differ considerably in size though not more than the cocoanut and others. There is also a noticeable difference in the abundance of spines. Such apparent variability may, however, be due to age, the older trees tending to become less densely beset with the brittle black spines which are often conspicuous on young specimens. The specimens (no. 878) and photographs on which this genus and species were based were secured on the limestone hills near the wagon road between Bayamon and Toa Baja where the present palm is not uncommon. _Curima_ appeared to be especially abundant about Bayamon but is probably rather generally distributed in the limestone hills of the island, perhaps also on other soils. A few trees were seen along the road between Utuado and Lares, and numerous others between Isolina and Manati. Sintenis collected specimens of what is apparently the same species near Juncos and Hato Grande, and at Maricao young specimens discussed under _Bactris acanthophylla_. As far as Puerto Rico is concerned, this palm is very easily recognized by means of the curiously truncate leaf-divisions, the outer margins of which appear as though accidentally injured or eaten away by caterpillars. This feature is, however, shared with numerous other West Indian and South American palms, though apparently only one, the so-called _grigri_ palm of Martinique can be referred to the present genus with confidence. For this the name =Curima corallina= (_Martinezia corallina_ Martius, Hist. Nat. Palm. 3: 284) appears to be correct, although Martius places Gaertner’s much older _Bactris minima_ as a synonym for his species. Gaertner, however, was making a second attempt at renaming Jacquin’s _Bactris minor_, having previously misplaced that name in connection with a West Indian _Acrocomia_, probably the same to which Jacquin had already supplied the name _Cocos aculeatus_. Thus it is possible to treat _Bactris minima_ Gaertner as a synonym of _Bactris minor_ Jacquin and the restoration of Gaertner’s inappropriate name for the _Curima_ is thus avoided.