Dear All, I acknowledge the helps that I have got from several persons regarding the author name and year of description of some species. May I take further previlage to request further for the same job of the following species: Argobuccinum australasiae Perry Crucibulum auriculatum Gmelin Terebralia telescopium L Potamides cingulatus (Gmelin) Turritella javana Lamarck Pila virens (Lamark) Bithynia stenothyroides Dohrn Bulla ficus With regards Dr. Bidhan ch. Das Professor Dept. of Zoology, University of Rajshahi, Rajshahi-6205, Bangladesh