Note 140 — Genus—VERRUCA. Pl. 21.
Reading edition
The solvent may be carbonic acid gas, as suggested by Mr. C. S. Bate in the case of Mollusca (‘Report of British Association,’ 1849, p. 73), but here, under the basal membrane, we cannot have the respiratory currents, or the ciliary action (see note, supra), as likewise suggested by Mr. Bate.