182 _ ON THE MORPHOLOGY OF 
almost the entire pitcher. The pitcher-leaf of Cephalotus, with its 
oo pouching, whereby the apex of the a is curve round 
s to become Lanne gee ve its base, may not i uptl rg com- 
Ww 
the lamina and approxima of apex to base. The interest of 
this comparison is further Seaueal by the circumstance that in 
both cases the internal surface is developed Sects rp for ver 
different purposes) as a secreting apparatus. illustration i 
he parallel, I 
Cephalotus (Plate 219, fig. 6), placed in _—— a position—with 
petiole nearly vertical—as will enable any one at a glance to com- 
pare it with the nectariferous petal of demain (Plate 219, oe ite a& 
figure of which I have borrowed from Prof. Asa Gray’s ‘ Text 7 
at conclusions to which I have been led may thus nett te 
stat 
That the pitcher results from a calceolate pouching of the 
ef bade from the upper surface. 
hat the apex of the leaf is on the far side of the pitcher- 
orifice from the main axis and from eu Sor and is probably repre- 
sented by the tip of the middle dorsal w 
8rd. That the pitehbe-t lid reieostaalra an a onigindh or excrescence 
from the upper leaf-surface. 
8 place I must mention Naes Dr. Masters, in : his ‘ Tera- 
or imperfect pitchers may be feequently met with in which the 
not been sufficient to enable Dr. Masters to come 
definite opinion on pitcher-morphology. This may = prs a 
‘from his samediotely following conclusions as to ascidia in general, 
which run thus :—* It is not in all cases easy to trace the origin 
and nae nature of the ascidium, as the venation is sometimes 
obscure. If there be a single well- marked midrib the probability is 
that the case is one of cohesion of the margins of the leaf ; but if 
formed from the hollow end of a leaf-stalk. Further information 
is ok needed as to the mode of gre lopment and formation 
of e tubular organs so as to ascertain clearly when they are the 
restilt “of a true cu upping vee and when of cohesion of the 
margins of one or more leay 
In soneluhiti, Imay vile to the principal points for comparison, 
* To this — Dr. Masters would, no do 
ubt, relegate the case of Cepha- 
toes = seems just possible that in the monstrosities of Cephalotus petubhed 10 
hy sole he sallien® of the pitcher-lid has been mistaken for a > siadiideathey 
