| 31. | Shells produced are extremely involute and have no umbilicus.
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| 32. | The umbilicus is also rarely seen in other species.
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| 33. | Umbilicus moderately wide and deep, showing a portion of the penultimate whorl.
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| 34. | The umbilicus has a small open depression leading into a minute central pore.
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| 35. | The place of the umbilicus is marked by a pit
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| 36. | The umbilicus and its margin are pure white, the aperture nacreous green.
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| 37. | In children ovarian cysts reaching above the level of the umbilicus are considered giant.
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| 38. | Traditional open surgery is usually performed through a ventral midline incision below the umbilicus.
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| 39. | The first port is made just behind the umbilicus and the camera is inserted.
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| 40. | On the inside of the outer lip, various ridges or plications called umbilicus.
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