. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Deep Sea Protobranchs • Allen and Sanders 13 visceral ganglion testis siph palp probosc feedi ape hind gut. digestive diverticula ant. add. mus. ant. sense organ 'byssal' gland palp 1 mm Figure 9. Unnamed species of Spinula. Semidiagrammatic view of right side of the animal to show disposition of the organs. even concentric ridges; rostrum short, sharply pointed; umbos sHghtly anterior in position, in larger specimens small with low profile, beaks medially curve; dorsal margin moderately convex; antero- dorsal margin
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Deep Sea Protobranchs • Allen and Sanders 13 visceral ganglion testis siph palp probosc feedi ape hind gut. digestive diverticula ant. add. mus. ant. sense organ 'byssal' gland palp 1 mm Figure 9. Unnamed species of Spinula. Semidiagrammatic view of right side of the animal to show disposition of the organs. even concentric ridges; rostrum short, sharply pointed; umbos sHghtly anterior in position, in larger specimens small with low profile, beaks medially curve; dorsal margin moderately convex; antero- dorsal margin sloping sharply to form smooth curve with anterior margin; pos- tero-dorsal margin nearly straight be- tween umbo and distal edge of hinge plate, thereafter angling abruptly to form a short, usually sharp, pointed rostrum demarked from ventral margin by a con- cave sinuosity; ventral margin long, smoothly curved, convex, with greatest convexity in larger shells adjacent to pos- terior sinus (, maximum shell height posterior to umbo); keel present, extend- ing from umbo to point of rostrum, weak- ly developed near rostrum, becoming strong anteriorly where concentric lines fomi a sharp angle; hinge broad, strong and relatively long; anterior hinge plate. 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, Mass. : The Museum
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Keywords: ., bookauthorharvarduniversity, bookcentury1900, booksubjectzoology
