. Bulletin of the British Museum (Natural History). PEBASIAN MOLLUSCAN FAUNAS 179. Figs 9-14 Neritina ortoni Conrad. Pebasian, Pichana, Peru; Hauxwell Colin. 9, GG25473, shell figured by Woodward (1871: pi. 5, figs 2a, b), tilted front view x 2. 10, GG25474, shell accompanying GG25473, top x 2. 11, GG21783, side, showing sinuate outer lip, x 12a, b, GG21782, front, oblique view into aperture to show columella, x 13, GG21784, base x 2. 14, GG21785, similar view to Fig. 11, but with outer lip broken away showing columella, x 1966 Neritina etheridgei Roxo; Willard: 66, 67
. Bulletin of the British Museum (Natural History). PEBASIAN MOLLUSCAN FAUNAS 179. Figs 9-14 Neritina ortoni Conrad. Pebasian, Pichana, Peru; Hauxwell Colin. 9, GG25473, shell figured by Woodward (1871: pi. 5, figs 2a, b), tilted front view x 2. 10, GG25474, shell accompanying GG25473, top x 2. 11, GG21783, side, showing sinuate outer lip, x 12a, b, GG21782, front, oblique view into aperture to show columella, x 13, GG21784, base x 2. 14, GG21785, similar view to Fig. 11, but with outer lip broken away showing columella, x 1966 Neritina etheridgei Roxo; Willard: 66, 67; pi. 62, figs 1, 2. 1966 Neritina ortoni Conrad; Willard: 66. 1966 Neritina puncta Etheridge; Willard: 66. Type material. Types of N. ortoni Conrad, 1871, Late Caenozoic, Pebasian; Pichana, Peru (Hauxwell Collection) (NYSM, Clarke 1906). Not studied. Lectotype of N. puncta Etheridge, 1879, selected herein. BMPD GG19992, Late Caenozoic, Pebasian, Canama, Peru (Barrington Brown Collection); probably the specimen figured by Etheridge, pi. 7, fig. 9. Two accompanying, probably unfigured, shells, GG19993, GG21777, details as above, are paralectotypes. Lectotype of N. ziczac Etheridge, 1879, selected herein. BMPD GG19994, Late Caenozoic, Pebasian, Canama, Peru (Barrington Brown Collection); the original of his pi. 7, fig. 10 (front view). GG19995, details as above, figured by Etheridge, pi. 7, fig. 10a (rear view), is a paralectotype. Holotype of N. amazonensis de Greve, 1938: pi. 5, figs 4, 5, 6, 8. PIMUZ 219, Late Caenozoic, Iquitos, Peru (Peyer Collection). ('Typus' of de Greve). PIMUZ 220, details as above, but not figured by de Greve, is a paratype. Holotype of N. roxoi de Greve, 1938: pi. 5, figs 11, 16. PIMUZ 216B, Iquitos, details as for N. amazonensis. Another shell figured by de Greve, pi. 5, fig. 10, is a paratype; these two are accompanied by a third unnumbered shell which was not mentioned by de Greve and is therefore not a paratype. Other material studied. G25473, Late
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