RECORD: Darwin, C. R. 10-11.1880. Pot IV / Habits / Leaf-mould & red fine sand. [Earthworm research notes]. CUL-DAR65.10. Edited by John van Wyhe (The Complete Work of Charles Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Prepared and edited by John van Wyhe 7.2025. RN1

NOTE: See record in the Darwin Online manuscript catalogue, enter its Identifier here. Reproduced with permission of the Syndics of Cambridge University Library and William Huxley Darwin. The volume CUL-DAR65 contains materials for Earthworms.


10

Oct 25 1880

Pot IV Habits

Leaf-mould & red fine sand mixed & well pressed down with bits of red verandah tiles on surface — 3 largish worms & 1 youngish put in at 4˚P.m., in 35' all but tail of one disappeared.

Nov 7th removed leaves — Worms from further end of K. Garden

Nov. 25th — a good many fir-leaves drawn far down holes by base — very many bits of tiles carried down — many of holes partially lined with bits of decayed leaves — I can see endless pellets of castings on walls of burrows — no doubt it is these which many cause lining of tubes — (4 worms dissolved — only 1 bit of tile in gizzard of one — a dozen or 2 bits in intestines of several (preserved) all red, though they must have swallowed some leave-mould.)

Nov. 27 examined bits of tiles from gizzard (from intestines) of worms in Pot III & IV under walk compound — no clear evidence of trituration — certainly offer none — but apparently some in smallest particles — Perhaps each fragment, but kept long enough in gizzard.

Trituration


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Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)

File last updated 27 July, 2025