Note 73 — VIII.
Reading edition
The exuvia of the cirri are sloughed from the Balanidæ about every week in summer; and perhaps this process is coetaneous with an addition to the valves.
Reading edition
The exuvia of the cirri are sloughed from the Balanidæ about every week in summer; and perhaps this process is coetaneous with an addition to the valves.