Licence: Public Domain Mark
Credit: The movements of diatoms / by Jabez Hogg. Source: Wellcome Collection.
Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.
1/10
![^Reprintedfrom ''The biterv^j/flal Journal of Microscopy and Natural Scte^^^anuary, iSp2.] Zl)c flDovemcnte of Diatome. By Jabez Hogg, M.R.C.S., F.R.M.S., etc. HE remarkable movements exhibited by the Diatomacese X have for a century or more continued to engage the atten- tion of microscopists, and who, failing to offer a satisfac- tory explanation of the phenomenon, appear to have concealed their ignorance of the subject under a cloud of hypotheses. In the October number of the International Journal of Microscopy and Natural Science the question is placed once more before us by Mr. G. H. Bryan, who ventures to offec a few very judicious remarks on a recently published paper by Mr, J. G. Grenfell, entitled On Some Species of Diatoms with Pseudo- podia, * and his observations are confined to certain fixed forms of diatoms belonging to the genera Melosira and Cyclotella, both of which, when examined in the dried state, are seen to be furnished with a series of radiatory processes, perfectly rigid and non-con- tractile. Now, I entirely concur in Mr. Bryan's view, that these are, in no sense of the word, pseudopodia, neither are they, or can they be, regarded as organs of locomotion, and their discovery— which, by the way, is a very aged one—throws no light whatever * This paper appears in extenso in the Quarterly Journal of Microscopi- cal Science for Oct., p. 615, and the title it bears is On the Occurrence of Pseudopodia in the Diatomaceous Genera, Melosira and Cyclotella.](https://iiif.wellcomecollection.org/image/b22305488_0003.jp2/full/800%2C/0/default.jpg)
