168 
camptodroma ; nervo primario valido apicem versus attenuate ; nervis 
sccundariis tenuibus, subangulis 55-60° orientibus, fiexuosis, imequalibus, 
simplicibus vel ramosis ; nervis tertiariis e latere externo secundariorum sub 
angulis acutis exeunt ibus, inter sc conjunctis. 
Obs . — The calyx represented in Pig. 12 shows a five-sect limb, the 
segments of which exhibit a firmer scarious texture. The form of the 
segments is more elliptical than oval, scarcely narrowed towards its ends and 
somewhat obtuse at apex. The nervation consists of five longitudinal nerves. 
They send out other lateral anastomosing nerves at acute angles. The extreme 
longitudinal nerves are shorter than the others and close to the margin. The 
gynoecium of the hermaphrodite flower is distinctly marked. The segments 
of the calyx are connate at their base with the gynsecium, on the periphery 
o£ which the basilar ends of the longitudinal nerves are still visible. Ovary 
is therefore inferum. The tube of the calyx is very short. The androecium 
shows some remains of the stamina. The latter are much shorter than the 
segments of the calyx, and at least double their number. 
The determination of the family to which the calyx now described 
belongs, presents no difficulties, but it was impossible to range it in a living 
genus of this family. Respecting the family, Ebenacem, Convolvulacese, 
and Combrctaceae exhibit similar calyces, and some of them have been 
discovered in the Tertiary strata. But both the first and the second named 
family possess a free ovary, their calyx not being connate with it; they cannot 
therefore come into consideration here. Only the third family remains, to 
which all the above-described characters of flower suit best. Amongst the 
genera of the Combretacese only Getonia seems to agree with our fossil. But 
on closer examination we find some distin sunshine; characters between both 
which arc too important to allow of our being blind to their influence upon 
the determination of the genus. The calyx of Getonia possesses a campanu- 
late limb exhibiting lanceolate three-nerved segments, whilst our fossil calyx 
shows a flat limb with shorter and broader five-nerved segments. Besides, 
its tube is much shorter than that of Getonia. Therefore I think it better, 
in this case, to create a new genus which is closely allied to the one just 
named. 
I unite with the described calyx a leaf, represented in Pig. 11. Its 
texture is strikingly thick and firm. The petiole is 6 millimeters long and 4 
millimeters broad. The lamina is oblong-ovate, somewhat narrowed at the 
base, entire and recurved at the margin. The primary nerve is thick and 
