. Bulletin of the Southern California Academy of Sciences. Science; Natural history; Natural history. PLATE 4 Figs. 1-4. Mytilopsis zeteki Hertlein & Hanna, new species. 1-2. Para- type. No. 9446 (Calif. Acad. Sci. Dept. Paleo. Type Coll.). Beak to base, mm. 3. Paratype, No. 9447 (Calif. Acad. Sci. Dept. Paleo. Type Coll.). Beak to base, mm. 4. Holo- type. No. 9445 (Calif. Acad. S'ci. Dept. Paleo. Type Coll.). Beak to base, 25 mm. Figs. 5-8. Mytilopsis allyneana Hertlein &' Hanna, new species. 5-7. Holotype, No. 9452 (Calif. Acad. Sci. Dept. Paleo. Type Coll.). Beak to base,
. Bulletin of the Southern California Academy of Sciences. Science; Natural history; Natural history. PLATE 4 Figs. 1-4. Mytilopsis zeteki Hertlein & Hanna, new species. 1-2. Para- type. No. 9446 (Calif. Acad. Sci. Dept. Paleo. Type Coll.). Beak to base, mm. 3. Paratype, No. 9447 (Calif. Acad. Sci. Dept. Paleo. Type Coll.). Beak to base, mm. 4. Holo- type. No. 9445 (Calif. Acad. S'ci. Dept. Paleo. Type Coll.). Beak to base, 25 mm. Figs. 5-8. Mytilopsis allyneana Hertlein &' Hanna, new species. 5-7. Holotype, No. 9452 (Calif. Acad. Sci. Dept. Paleo. Type Coll.). Beak to base, mm. 8. Paratype, No. 9453 (Calif. Acad. Sci. Dept. Paleo. Type Coll.). Beak to base, mm. straighter and the posterior end of the shell is more obliquely elliptical. This species is named for Dr. James Zetek who collected the type specimens. References to a number of Cenozoic species of Mytilopsis have been consulted by us during our study of the present species. We have brought these together here for the convenience of other workers. The arrangement is alphabetic by species under the genus as originally described. 16. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Southern California Academy of Sciences. Los Angeles, Calif. : The Academy
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