IN examining some of the numerous Sumatran species of Cyrtundra, I was lately led to observe the great inaccuracy of Forstds description and figure of the fruit, which has been the cause of deception in regard to its natural affinities. His error consists in representing the septum as complete, with adnate placentae similar to what obtains in some genera belonging to Scrophularine ; whereas, in reality, it is bipartite through the axis of the fruit, and the placenk are no other than the revolute lobes of the septa. This peculiar structure is more distinct in the nearly related genus of Didtpocarpzis (Mal. Misc. uol. i.), which has capsular fruit, and where the lobes of the contrary dissepiment so completely bipart the cells as to give it the appearance of being quadrilocular. It is obvious that this character is totally inconsistent with that of Scrophularina, and it does not accord exactly with any of the Jussiaean orders. Didymocarpus is related to Bignoiiiacea through Incarvillecl, but is not admissible into that family as defined by Mr. Brown in his Prod. Fi. Nov.Holl. I am therefore inclined to think that Cyrtandra, Didymocarpus, and another genus, which I shall here present under the name of Lomnia, which agree remarkably in general habit as well as in carpological structure, may properly form a small and 24 D r . JACK on Cyrtmidrucece, and distinct family near to Egnoniacee. The two first genera are numerous in the Malay islands ; and I may remark that, as far as my present observations extend, the Cyrtundra appear to prevail principally to the south of the Equator, and the Didymocarpi on the north, where it has even been found, according to the observations of Dr. Walliclz, to extend to the alpine regions of Nepal. I shall proceed to give the characters by which this family and its genera are distinguished, and shall add descriptions of all the species that I have as yet hnd an opportunity of examining.
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