| 1. | A cristid obliqua descends from the hypoconid and reaches the protoconid.
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| 2. | There is a labial cingulum between the protoconid and hypoconid.
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| 3. | The protoconid is the highest cusp of the trigonid.
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| 4. | A crest, the metalophid, reaches from the protoconid nearly to the metaconid.
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| 5. | The trigonid contains strong protoconid and metaconid cusps.
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| 6. | The apical cusp is the primitive protoconid.
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| 7. | The lower molars also have four cusps : metaconid, protoconid, hypoconid, and entoconid.
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| 8. | The two cusps at the front, the protoconid and metaconid, are isolated from each other.
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| 9. | In the living colugos, the protoconid is higher than the metaconid in both p4 and m1.
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| 10. | A crest, the cristid obliqua, connects the front side of the hypoconid to the protoconid.
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