Cnar. XV. CONCLUDING REMARKS, 341 
were then pushed on to the sessile glands. One shred, 
after 2 hrs. 30 m., seemed quite dissolved, but this may 
have been a mistake. A second, when examined after 
17 hrs. 25 m., was liquefied, but the liquid as seen 
under the microscope still contained floating granules 
.of fibrin, The other two shreds were completely 
liquefied after 21 hrs. 30 m.; but in one of the drops 
a very few granules could still be detected. These, 
however, were dissolved after an additional interval 
of 6 hrs. 30 m.; and the surface of the leaf for some 
distance all round was covered with limpid fluid. It 
thus appears that Drosophyllum digests albumen 
and fibrin rather more quickly than Drosera can; 
and this may perhaps be attributed to the acid, 
together probably with some small amount of the 
ferment, being present in the secretion, before the 
glands have been stimulated ; so that digestion begins 
at once. 
Concluding Remarks.—The linear leaves of Droso- 
phyllum differ but slightly from those of certain 
species of Drosera; the chief differences being, firstly, 
the presence of minute, almost sessile, glands, which, 
like those of Dionza, do not secrete until they are 
excited by the absorption of nitrogenous matter. But 
glands of this kind are present on the leaves of 
Drosera binata, and appear to be represented by the 
papille on the leaves of Drosera rotundifolia. Secondly, 
the presence of tentacles on the backs of the leaves ; 
but we have seen that a few tentacles, irregularly placed 
and tending towards abortion, are retained on the 
backs of the leaves of Drosera binata. There are 
greater differences in function between the two ge- 
nera. The most important one is that the tentacles 
of Drosophyllum have no power of movement; this 
.08s being partially replaced by the drops of viscid 
