[26]

Dionæa

Oct 16' 74. 8° A.m

Urea 1 gr to 1 oz. towards the base apex of each leaf & sugar 1 gr to 1 oz towards apex basis of each leaf (& spike of young leaf in Urea)

(N. B as bits of inorganic objects did not cause secretion we may infer that peptogen are necessary, as well asfrom dried bits of meat & gelatine.

(It is hard to say, as separate glands occur in Drosophyllum, & as Aldrovanda has no spikes, but except tenuous ones, it is hard to say whether Dionaea descendedfrom common one with tentacles or not. — Perhaps 2 kinds of movement, acquired independentlyfrom one source being no power of movement. — there is no grt difference between blade & its prolongation into tentacles — As Dionæa has such prolongation, probably descendedfrom a Roridula-like-form.—) & no spiral vessels to separate glands.

Oct 17 on one leaf the 2 drops ran together after a few hours & the leaf was open last night— but this morning 7° 30" leaf closed!!! Plants kept under Bell-glass damp.—

[26v]

The marginal spike do not end in Bristle.

The [petaloids] [petaloids] very pretty bodiesfrom symmetrical shape & colour. — Have. nature of Hairs. Say very doubtful about function if any

(I saw another case of 4 sensitive filaments on one side— bears on Aldrovanda.)

[27]

Oct 17th the secretion from of drops of urea & sugar not acid — I suspect leaf in bad state, glands hardly purple, as far as I cd judge not affected by Urea or sugar. —

(The petaloids are 8-rayed — each division [sketch] oval— on short footstalk, lined with brownish-orange protoplasmic layer— this a little aggregated here & there in specks, but some orange lining to all the processes.

In some spikes which had been in the urea for 25° the protoplasmic layer greatly aggregated into irregularly shaped masses which apparently do not change form.

From analogy of Utricularia & Aldrovanda I suspect may serve to absorb putrid vapour, but as so they about so far more running on backs of spikes, it is very doubtful whether they ever can get any putrid fluid — almost impossible ─ vapour wd affect inside far more than outside. —

((Suspend in bottle with putrid meat & another in Bottle over water.

[27v]

From D. digesting & from position of octofids cannot have exhalations from captured insects.)

(Oct 18th 17th 7° A.m some spikes of unimmersed spec. were placed in urea. (1 gr. to 1 oz) & examined to day 18th 10° 30' & the orange octofids not at all affected my previous observation must have been all erroneous. — There are some octofids in notches between spikes & rather on inner or vapour side