To T. H. Huxley 3 [September 1855]1
Down Farnborough Kent
My dear Huxley
I think your Diagrams will do very well.— What an advantage to be able to sketch easily! no one has a right to attempt to be a naturalist who cannot.—2 I have made a few pencil marks— The chief correction is the position of the great ganglion, which ought to be more to left-hand.— I never cd see cement-gland in Lepas, though I traced cement-duct some way up peduncle; but from the analogy of 4 other genera its most probable position is where I have put cross.3
I think the stomach ought to be larger, though of course there is some variability in its size according to its contents &c. in same species.—4
Yours very sincerely | C. Darwin [DIAGRAM HERE] The lower end of œsophagus rather more bell-shaped; more medial; whole upper end of stomach broader, as I have put it: cæca arise where bell-end of oesophagus joins the stomach— Put the Cement gland (see my Pl. IX fig 3) here: & let the ovarian tubes & cæca branch out & fill the whole peduncle.— In Peduncle there ought to be transverse & oblique muscles It wd be more strictly correct, but really does not signify on this scale, if the antennæ were put a little more to left. ie not quite medial, or not at basal point of peduncle. [DIAGRAM HERE] The main sub-œsophageal ganglion ought to be more to left, where I have put pencil cross— The whole stomach ought to be larger & I think this wd also make your drawing plainer: you had better not have put in cæca, as their presence is evidently of very little importance. The arborescent testes ought to extend posteriorly over whole stomach, but perhaps you purposely leave them out to prevent confusion.— You had better draw two thin reddish-brown lines from the ovaria to within the Antennæ.
Approves drawing. No one who cannot draw should attempt to be a naturalist. Suggests corrections to [Lepas?] drawing. Comments on position of ganglia, cement glands, and stomach.
- Letter no.
- Darwin, C. R.
- Huxley, T. H.
- Sent from
- Source of text
- Imperial College of Science, Technology, and Medicine Archives (Huxley 5: 18)
- Physical description
Please cite as
Darwin Correspondence Project, “Letter no. 1759,” accessed on 19 February 2017, http://www.darwinproject.ac.uk/DCP-LETT-1759