| 1. | Females have two mammae on the lower abdomen for feeding young.
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| 2. | Females have one pair of mammae located in the chest region.
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| 3. | Females have four pairs of mammae, as usual in oryzomyines.
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| 4. | Females have four mammae, two pectoral and two inguinal.
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| 5. | The hog can have as many as eighteen mammae.
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| 6. | Like most oryzomyines, it has eight mammae, including a pectoral pair.
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| 7. | As in most oryzomyines, females have eight mammae.
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| 8. | The tail is long and females have six mammae.
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| 9. | All species have two pairs of inguinal mammae.
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| 10. | The pouch opens forward and contains four mammae.
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