. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Deep Sea Protobranxhs • Sanders b- Allen oesophagus digestive duels sorting area. Figure 22. Tindaria cytherea (Dail). Internal detail of the left and right sides of the stomach. 27c); external ligament elongate, narrow, extending posteriorly to near the insertion of the second tooth of posterior hinge plate series and extending anteriorly to tlie inser- tion of the first tooth of anterior series; dorsal shell margin weakly convex; antero- dorsal margin short, rather sti'aight and, distally, sloping ventrally to form
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Deep Sea Protobranxhs • Sanders b- Allen oesophagus digestive duels sorting area. Figure 22. Tindaria cytherea (Dail). Internal detail of the left and right sides of the stomach. 27c); external ligament elongate, narrow, extending posteriorly to near the insertion of the second tooth of posterior hinge plate series and extending anteriorly to tlie inser- tion of the first tooth of anterior series; dorsal shell margin weakly convex; antero- dorsal margin short, rather sti'aight and, distally, sloping ventrally to form a smooth curve with the anterior margin; postero- dorsal margin longer, slightly convex to form continuous curve with the posterior margin; anterior and posterior margins evenly rounded; ventral margin elongate and moderately convex. Hinge plate thin, rather weak with a rela- tively broad edentulous space separating the anterior and posterior rows of teeth; posterior hinge series with six chevron- shaped teeth; anterior hinge series shorter, with three similar teeth (Fig. 23). Tindaria miniscula differs from T. callisti- formis, T. hessleri and T. cijtherea in its small size, oval shape, few teeth on thin hinge plate, the extensive endentulous space on hinge plate beneath umbo and the more medial position of the umbo. Morpliology of the soft parts. Incurrent region with three papillae to the left side and two to the right; adductor muscles small, unequal in size; gill very small with six to seven plates to each demibranch; palp with five to six ridges; hind gut penetrates mantle of right side almost to the pallial line; part of hind gut lies adjacent to the posterior face of the anterior adductor. 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 Harvard University. Museum of Comparative Zoology. Cambridge,
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