598 
APPENDIX. [ Botany of Terra Australis. 
inclusa cellulis clausis, mutuo pressione varie angulata, circumscriptione subovata glabra 
imprcsso-punctala, altera extremitate, ssepius obtusiore, affixa ; chorda ventrali ab umbi- 
lico par vo ducta ad extremitatem oppositam ibique in chalazam integumento imeriori 
adnatam desinente : Integumentum duplex ; exterius membranaceum intus uudique 
emittcns processus breves inter rugas albuminis demissos, et secundum chordam ventralem 
processum continuum altiorem nucleum semibipartieriterri ; internes tenuissimum albu- 
mine arctissime adnatum : Albumen semini conforme carnosum lobatum. Embryo in 
regione umb lici, albumine 5 -dies brevior, dicotyledoneus albicans: Cotyledones lineares 
foliacese : Radkula teres recta longitudine cotyledonum. 
Obs. This genus forms a very unexpected addition to Annonaceee, of 
which it will constitute a distinct section, remarkable in the manifestly 
perigynous insertion of its stamina and the cohesion of the tube of its 
calyx with the ovarium. It has therefore nearly the same relation to the 
other genera of the order that Nyrnphsea has to Hydropeltis : and the 
affinity in both cases is chiefly determined by the structure of the seed. 
The Operculum of Eupomatia, in which there is no mark of longi- 
tudinal division, may be considered as formed either of the calyx alone, 
Or of the confluent calyx and corolla, as appears to be the case at least 
in several species of Eucalyptus. 
A singular part of the structure of Eupomatia consists in its internal, 
barren, petal-like stamina, which, from their number and disposition, com- 
pletely cut off all communication between the Anther® and Stigmata. 
This communication appears to be restored by certain minute insects 
eating the petal-like filaments, while the antheriferous stamina, which 
are either expanded or reflected, and appear to be even slightly irritable, 
remain untouched. I have at least not unfrequently .seen the barren sta- 
mina removed in this way, and, as all the stamina are firmly connected at 
the base and fall off together, it is difficult to conceive any other mode of 
exposing the Stigmata to the influence of the Anther®. 
