Asks CD whether he knows of "anything worth looking at" that has appeared abroad on his theory of the origin of species.

Thanks CD for specimens which show that an abnormality in one genus is normal in another, which bears on CD’s views on descent.

The ovule of Primula is amphitropous or what J. Georg Agardh calls apotropo-amphitropous [see Theoria systematis plantarum (1858), tab. 24, fig. 5–6].

The niata is a very good case because the race is well established and must originate in South America. There is a description of the head by [Richard] Owen in the Descriptive catalogue of the osteological collection of the College of Surgeons.

Has observed modifications in the skeletons of rabbits, ducks, poultry, and pigeons. There is an extract about modifications in pigeons in the first chapter of Origin. Encloses a woodcut of crested or polish fowls; there is a change in the brain as well as in the exterior bones.

Difference in plumage of Ardeola, a species of heron, in summer and winter. [See Descent 2: 190.]

Thanks for information on Primula ovules. From what DO says the pollen-tubes ought to find their way to the micropyle.