( 327) 
adjacent lobes of other carpels and thus the true stigmatic 
lobes stand opposite the partitions and not opposite the 
carpels. 
The observations upon the development of the gynoecium 
of the Cucurbitaceae, as about to be described, have been 
carefully made by means of microtome sections of the grow- 
ing tips of the flowering shoot. The serial sections prepared 
have afforded a means of comparison of the different stages 
of growth quite satisfactory. 
Fevilleae 
The apex of the stem of Fevil/ea presents a dome-like 
form and in longitudinal section shows its epidermal and 
subepidermal cells in regular series lying in ‘‘ confocal 
parabola” as Strasburger” describes for Polygonum divari- 
catum. The regularity in the arrangement of the cells is 
maintained to three or four layers below the epidermis. 
Slightly below the apex of the stem in the axil of a leaf- 
rudiment may be found the primordia of the young flowers. 
A blunt outgrowth may here be seen, which in the progress 
of its growth soon loses all trace of the confocal arrange- 
ment of its cells, and by numerous divisions, longitudinal 
with reference to the axis of the flower, becomes flattened at 
the apex and broadens out like the base of a cone. Around 
the border of this body, in a slightly later stage, five slight 
elevations may be detected which become quite distinct be- 
fore any other organs are differentiated. Figure 5 (PI. I) 
shows the young floral rudiment, with two of the five young 
calyx-lobes, bent sharply over the flattened end. 
Goebel” describes the development of the gynoecium in 
Eprphyllum truncatum which, he declares, is in the funda- 
mental points the same process of development as that which 
is to be observed in all inferior ovaries. In Apzphyllum the 
calyx and corolla arise in spiral order but before they are all 
laid down the flattened end of the axis shows a crater-like 
deepening, from the borders of which the carpels spring and 
grow up to form the style. The placentae are developed as 
