| 41. | Shells are involute; venter rounded or gently tabulate; ribbing coarse, fold-like, branching.
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| 42. | Helical gears connect parallel shifts but the involute teeth are cut at an angle to the axis of rotation.
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| 43. | Its shell is involute, smooth and rather compressed, with the outer whorl strongly embracing the inner whorls.
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| 44. | Hedenstroemiidae are described as having discoidal, compressed, generally smooth, involute shells with tabulate to oxynote venters.
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| 45. | The shell ( conch ) : essentially involute and ribbed throughout, umbilical edge sharp, outer whorl oxyconic.
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| 46. | Culms are 40 100 cm long; leaf blades are filiform, involute, and 1 2 mm wide.
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| 47. | The shell of " Proclydonautilus ", like those of other Clydonautilitidae, is involute and smooth.
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| 48. | A strange hypocrisy about sex _ too complex and involuted to be a simple double standard _ haunts the culture.
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| 49. | Logarithmic spirals are also congruent to their own involutes, evolutes, and the pedal curves based on their centers.
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| 50. | Because the evolute of the nephroid is another nephroid, so the involute of the nephroid is also another nephroid.
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