110 MK. MIERS ON SEVERAL INSTANCES OF ANOMALOUS DEVELOPMENT 
from view, and has thus remained unnoticed. The assurance that such å movement 
must actually have taken place, is proved by the form of the raphe, and the very different 
position of the integuments in the ripe seed to that which they ought to have, according 
to the usual structural development. It is more than probable that the embryo-sac still 
remains immediately investing the embryo, in the Cueurbitaceæ, but this is not easily 
discernible, as there is no albumen, and as the primine and secundine, and probably also 
the tercine, become resolved into delicate membranes. Mirbel showed that about the 
period of fecundation, the embryo-sac had broken away from the gangylode ; and we must 
assume, in order to account for the changes that subsequently occurred, that. it also 
separated itself afterwards at the summit from the micropyle; but if the integuments 
received a subsequent amount of torsion, why did not the embryo-sac, or at least the 
embryo, follow the same movement? What could have retained the embryo in the same 
position it previously held, during the second inversion of the primine and secundine? 
The whole of this æconomy is so extraordinary, as to call for the especial investigation of 
some able botanist, aceustomed to accurate and delicate examination. I have simply 
announced the facts as I have found them, leaving it to be determined how far the hints 
above given, respecting the nature of these changes, may prove well-founded, or how far | 
the whole matter may be modified by farther evidence. 
The facts detailed in the preceding part of this paper clearly show, that the genus 
Urandra of Mr. Thwaites bears no relation whatever to the family of the Olacacee, 
and we have irresistible evidence that it differs in no respect from Stemonurus, 
with which genus it must remain, like Gomphandra, another of its synonyms; it 
agrees with it in its cupuliform, 5-toothed, persistent calyx, its five acuminated linear 
smooth valvate petals, its five alternate stamens, with thick filaments clothed at their 
summit with clavate hairs, oblong anthers somewhat divergent below, a conical ovary 
encircled at its base by a small annular gland, and unilocular, with two suspended ovules, 
a short style, and a small subcapitate stigma. The drupe and seed, as described by 
Mr. Thwaites, agree in every respect in their extraordinary development with what I 
have shown to exist in Stemonurus, and there is not one single feature, among those 
described, that I can discover, at variance with that genus. The plant of Mr. Thwaites, 
which appears to differ specifically from others on record, must therefore bear the name 
of Stemonurus apicalis. 
The remarks of Mr. Thwaites contained in his paper above cited, relative to the Ceylon 
species of Stemonurus described by me, will form the subject of a distinct notice. 
