In my last communication on the Rhizopoda of England and India, I ended with the mention of the new genus and species Acanthocystis turfacea (Annals, vol. xii. p. 263), the magnified view of the spine of which (vol. xiii. pl. 2. fig. 25 i) should not be tapering in the shaft, as therein represented, but of the same size throughout as at the bifid extremity. (See those round the entire figure.) Will the reader be pleased to make the correction? Just preceding the mention of Acanthocystis allusion is made to Actinophrys oculata as having been in company with A. Eichhornii in "fresh water." This is also a mistake; for I find by my notes that this species was found in another basin, and one which contained salt water. Further, I intimated my intention to write more on A. oculata hereafter; so we will now return to it.