Plate P4. Scale bar = 10 µm (magnification = 1250x). 1-5. Sample 182-1128C-26X-3, 115-117 cm. 6. Sample 182-1128C-8H-4, 130-132 cm. (1) Cestodiscus sp. (2) Cestodiscus sp. (3) Azpeitia oligocenica (Jousé) Sims. (4) Cestodiscus aff. intersectus (Brun) Reinhold. (5) Azpeitia oligocenica (Jousé) Sims. (6) Rocella vigilans Fenner.