. Bulletin. Science; Natural history; Natural history. 142 BULLETIN SOUTHERN CALIFORNIA ACADEMY OF SCIENCES VOLUME 73. Figures 1-3, 5. Nuttallia jamesi, new species; external and internal views of holotype (CAS Department of Geology No. 54330). Length mm. Figure 4. Nuttallia nuttallii (Conrad); internal view of right valve with ligament attached; Recent, southern California (CAS Department of Geology No. 54335). Length mm. Figure 6. Nuttallia jamesi, new species; dorsal view of paratype (CAS Department of Geology No. 54331). Length mm. Figure 7. Nuttallia jamesi, new species; de
. Bulletin. Science; Natural history; Natural history. 142 BULLETIN SOUTHERN CALIFORNIA ACADEMY OF SCIENCES VOLUME 73. Figures 1-3, 5. Nuttallia jamesi, new species; external and internal views of holotype (CAS Department of Geology No. 54330). Length mm. Figure 4. Nuttallia nuttallii (Conrad); internal view of right valve with ligament attached; Recent, southern California (CAS Department of Geology No. 54335). Length mm. Figure 6. Nuttallia jamesi, new species; dorsal view of paratype (CAS Department of Geology No. 54331). Length mm. Figure 7. Nuttallia jamesi, new species; detail of hinge of left valve of paratype (CAS Department of Geology No. 54332), nymph partly broken. Figure 8. Nuttallia olivacea (Jay); internal view of right valve; Recent, Iwai Mura, Chiba Prefecture, Japan (CAS Department of Geology No. 54334). Length mm. and hinge line sinuous in dorsal view, curving to the left posteriorly, to the right anteriorly. Description: Shell small for the genus, thin; in- equivalve, left valve more inflated than right valve; beaks situated at midline; anterior end of shell broad, evenly rounded, posterior end acuminate; surface of valves smooth except for incremental lines of varying strength. Hinge line shallowly sinuous in dorsal view, curving to the left posteriorly, to the right anteriorly. Right valve most inflated at about % of distance from beak to anterior end: compressed along both dorsal margins and along postero-ventral margin; with a radial angulation slightly below posterior dorsal mar- gin; beak small, pointed; hinge plate narrow, with two diverging, oblique cardinal teeth, the posterior tooth larger and bifid; anterior dorsal margin con- vex; posterior dorsal margin concave, with a narrow escutcheon proximally, in which rises an elongate,. 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
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