. Bulletin of the British Museum (Natural History). PEBASIAN MOLLUSCAN FAUNAS 207. Figs 140-146 Liris scalarioides (Etheridge). Pebasian; Puerto Narino, Colombia; Weeda Colin. 140, GG21561; a, front, x 15; b, oblique view of apex, x 50. 141, GG21565; a, rear, x 20; b, oblique view of apex, x 50. 142, GG19986; front, x 20. 143, GG21563; side, x 20. 144. GG21566; showing sculpture of early whorls, x 50. 145, GG21562; front, x 20. 146, GG21567; oblique view of early whorls, x 40. See also Fig. 456. whorl approaching the aperture. The aperture is slightly constricted. In both Puerto Nari
. Bulletin of the British Museum (Natural History). PEBASIAN MOLLUSCAN FAUNAS 207. Figs 140-146 Liris scalarioides (Etheridge). Pebasian; Puerto Narino, Colombia; Weeda Colin. 140, GG21561; a, front, x 15; b, oblique view of apex, x 50. 141, GG21565; a, rear, x 20; b, oblique view of apex, x 50. 142, GG19986; front, x 20. 143, GG21563; side, x 20. 144. GG21566; showing sculpture of early whorls, x 50. 145, GG21562; front, x 20. 146, GG21567; oblique view of early whorls, x 40. See also Fig. 456. whorl approaching the aperture. The aperture is slightly constricted. In both Puerto Narino and Iquitos shells, the peristome is sometimes detached. Remarks. The best specimens studied are those from Puerto Narino. The lectotype is rather worn, and the paralectotype is incomplete. The diagnosis is sufficient to separate this species from L. rninuscula. Costa's illustrations (particularly 1980: pi. 1, figs 1, 2), which show the carina typical of the young stages of L. scalarioides, confirm that not only her own records, but also that of Roxo (1924), should fall into the above synonymy. Further support for this redetermination is afforded by Costa's synonymy, which included references to the good figures quoted above of L. rninuscula dc Greve (1938), non Gabb, rather than dc Grevc's figures of laqueata' which are, in fact, of L. rninuscula: sec p. 204. Liris acicularis sp. nov. Figs 147-148 Holotype. GG21666, Late Caenozoic. Pebasian; Pichana. Peru (Hauxwell Colin, extracted 1982). GG21667-9. same details as holotype, are paratypes. Name. 'Sharply pointed'. DIAGNOSIS. Pointed, straight-sided Liris with spire angle of about 11°; shell sculptured with extremely weak spiral threads, and weak carinac situated at periphery and lower suture; growth lines comparatively strong in relation to spiral threads. Description. The first whorl is very small in relation to the bulbous second whorl. Subsequent whorls are distinctly less convex; their periphery is at mid-height an
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