| 21. | The smooth dorsal scales are arranged in 23 to 25 rows at midbody and the anal plate is undivided.
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| 22. | The anal plate is entire ( undivided ), but the subcaudals are in two rows ( divided ).
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| 23. | The ventrals number 220-265; the anal plate is entire; and the subcaudals number 75-94.
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| 24. | There are 280-315 ventral scales, an undivided anal plate, and 40-45 mostly single subcaudal scales.
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| 25. | Larva blackish-brown; the dorsal and subdorsal lines somewhat paler; thoracic and anal plates blackish; head brown.
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| 26. | They have a green body, a dark brown head and a central brown patch on the prothoracic shield and anal plate.
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| 27. | If this hypothesis is true, the anal plate of some sipunculans might be a remnant of a shell similar to that of hyoliths.
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| 28. | The most posterior plate is known as the anal plate ( sometimes called the " tail plate ", although chitons do not have tails .)
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| 29. | The ventrals are 134-138; the anal plate is divided; and the subcaudals, which are also divided, number 34-39.
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| 30. | The ventrals number 195-237; the anal plate is entire; and the single ( undivided ) subcaudals are 37-56 in number.
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