Notes on the collection of land-mollusca made by Dr. E . Jacobson on the Islands of Simalur and Babi in 1913, with descriptions of new species and races

摘要: I am indebted to the authorities of Leiden Museum for opportunity examining and reporting on large collection made by late Dr. E. Jacobson Simalur island its smaller satellite Pulau Babi, in 1913, between months January September. The is enough enable one study good series a number forms collected, justify naming several new races. Some had already been named C. A. van der Willigen, who studied years ago. Whenever possible adopted Willigen's MS names. It now compare faunas Is., Nias Enggano but fauna Mentawi islands unfortunately still very imperfectly known. have thank L. W. Venmans figures radulae species which he has kindly preparations, Mrs. Feen (nee Benthem Jutting) helpful notes. Also my thanks are due Regteren Altena trouble taken making available me. And lastly must record indebtedness Mr. Wilkins British (Natural History) three described below, other help always was ready give. Large though is, do not doubt that future collecting will add list. Any conclusions, therefore, from present list subject reservations. type-specimens below Museum.