Image from the Biodiversity Heritage Library.
Contributed by American Museum of Natural History Library.
| www.biodiversitylibrary.org
Transcription
my 4 point bands like muffled clap, 7
bands.
Each always lifts an inch when
whole goes down - also just up
be used to surface -
Short larks into this pit shape -
Flashes away shows my on whole time
swim.
One lump locks themselves clear out
of water twice.
Length by turns under water 10 & 20 min.