Figure 2. External anatomy and aspects of radula. (A) Dorsal view of live specimen from Batu Gatja River, Ambon; original drawing by A. Strubell, 1892 (modified from Küthe 1935, used with permission); (B) ventral view of live juvenile specimen from Watatiri, Ambon; (C–E) aspects of radula (modified from Küthe 1935, used with permission): (C) anterior view of rhachidian tooth, (D) right view of rhachidian tooth showing denticulate margins; (E) portion of folded radula with lateral plates, note lack of denticle in lp1; (F) scanning electron micrograph of radula of Watatiri specimen, note rhachidian teeth worn down to their bases and strong denticle on each lateral plate, asterisk indicates presumed position of second lateral plate folded down in the sample. Abbreviations: cc, central cusp of rhachidian tooth; dt, denticles; ey, eye; ft, foot; llp, left lateral plate; lp1 and 2, first and second lateral plates; lt, labial tentacles; rh, rhinophore; rlp, (first) right lateral plate; rt, rhachidian tooth. Scale bar: 20 µm.