In consequence of my description of the anatomy of Subulina kassaiana Rochebrune et Germain in Basteria, vol. 21, 1957, pp. 14—28, the late Mr. HUGH WATSON dissected some specimens of the species I could put at his disposal, and kindly acquainted me of his results, which appeared to differ in some respects from those I wrote down and figured in my paper. Because I studied at that time only one or two specimens and the dissection of the animals was very difficult not only because of their smallness, but chiefly because of the strongness of the alcohol, in which they were preserved, so that the organs had become rather delicate and easily breaking, Watson’s notes induced me to dissect some more specimens. These additional investigations compel to make some necessary improvements.