TY - JOUR T1 - The Malayan species of Opisthostoma (Gastropoda, Probranchia, Cyclophoridae), with a catalogue of all the species hitherto described JF - The Bulletin of the Raffles Museum Y1 - 1952 A1 - van Benthem-Jutting, W.S.S. SP - 5 EP - 61 VL - 24 UR - http://rmbr.nus.edu.sg/rbz/biblio/24/24brm005-062.pdf ER - TY - JOUR T1 - Additional new species and new localities of the family Vertiginidae and the genera Oophana and Opisthostoma from Malaya JF - The Bulletin of the Raffles Museum Y1 - 1961 A1 - van Benthem-Jutting, W.S.S. SP - 34 EP - 48 VL - 26 UR - http://rmbr.nus.edu.sg/rbz/biblio/26/26brm034-048.pdf ER -