[54]

Mimosa— circumnutation of leaflets — young leaves— with petiole at their bases cemented to top of stick— before N.E. window —Sep 14th

Filaments of glass very light & triangular

Lat. Terminal leaflet Lateral. Temp 64° F 7° 55' a.m 8° 55 little down 10. 23' up. 11° 35' down 12. 35. up little 2. 5 down 3 up 4. up & to Left 5° little down— not asleep Evng Brit 6° to Right 7° 12 up 8 55 to Right 10. 20' a little to right 6° 45' awake 8. 12 little up— 9 20 up & to R 10. 40 up. 11 47 up & to R 12 50 up & to R 2° 15 down little 2 .47 up & to left (I think somehow stuck Temp 62° F)   4 .5' short way 4. 52 to left 5° 50 nearly same spot 7° 20 down 8° 45' — leaf not asleep (2 likely entangled together) (2 likely entangled together) more asleep with & on left the slight

One of Lateral Leaflets in middle— 7°. 55' a.m.— 8° 55 down & to R 10. 23 down 11. 35'— do 12 35 up considerably 2. 5 much up. 3 up. 4' up 5 up & to R 6. far up. 7 12' up — asleep. as much as triangle will [illeg] 8° 55 rise 10. 20' gone back to left (15th) 6°. 45' awake but leaflet itself rather caught 8° 12 great fall or down 9° 20 down 10. 40' down. 11. 47' great rise! 12. 50 up. 2. 15 to left & atom down 2. 47 good way down (evg fell some 4° 5 up again — evng rise 4. 52' do 5 50 up. 7° 20 up & to Left 8° 45. down. (well asleep) 10. 20' an atom down 16th 6 55 a.m— awake 8° down 9' down middle leaflet — yet great [movement petiole] secured on back side of base

 

(a) left

Sub-Kingdom of the Arthropoda:

In this enormous sub-kingdom we

[Draft of Descent 1: 327]

[54v]

11

Chap. 9 Mollusca.

viduals would succeed best, and would increase in number; but this would be a case of natural and not of sexual selection.

Sub-kingdom of the Vermes or Annulosa.

Class-Annelida (or Sea-worms)— In this the lowest class of the enormous sub-kingdom of the Annulosa, although the sexes, (when separate) sometimes differ so greatly from each other that they have been placed under distinct genera, or even families, yet the differences do not seem to be of the kind which can safely be attributed to sexual selection. The one sex does not differ from the other in being furnished with weapons or with organs for seizing the female, or in being ornamented with bright colours. These animals, like the foregoing [word excised]in the preceding classes, apparently stand too low in the scale, for the individuals of either sex to exert any choice in selecting a partner, or for the individuals of the same sex to struggle together in rivalry.

Class, Crustacea (a) Back. — In this immense great class we first meet with characters which undoubtedly must be ranked as secondary sexual character, its secondary sexual, and which, which then are often developed to an in a extraordinary degree remarkable manner. Unfortunately the purposes subserved habits by the external differences between the sexes of the Crustacea are very imperfectly known, and therefore we cannot tell

[Draft of Descent 1: 327-8.]