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Show 1873.] MR. ST. G. MIVART ON THE LEMURS. 501 produced downwards and inwards as well as backwards; mastoidal region of periotic not inflated ; dorsal and lumbar vertebrae together not more than twenty ; tarsus short; os calcis less than one fifth the length of tibia; naviculare and cuboid subequal in length ; no hypapophysial prominences beneath the cervical vertebrae. Fig. 14. Dorsal aspect of left tarsus of Hapalemur simus. (Letters as before.) GALAGININ^E. I.-J-, C\„ Pm. I M. |, =4=34. Upper molars with an oblique ridge from the postero-external to the antero-internal cusp ; tarsus elongated; os calcis more than one fourth the length of the tibia; mammae two pectoral and two inguinal. Hab. Africa and Madagascar. CHEIROGALEUS. Tail longer than body. Upper incisors unequal, the anterior pair the larger; third upper premolar very much smaller than the first molar, and with only one external cusp ; first upper premolar as extended vertically as the second or more so; the postero-internal cusp of upper molars very small or absent; palate much prolonged beyond the last molars ; praemaxillae largely developed, joining the nasals for more than a quarter of their (the nasals') extent; an interparietal bone; mastoidal region of periotic not inflated; dorsal and seven lumbar vertebrae; an intermedium in carpus; length of os calcis more than one fourth that of tibia; naviculare not twice the length of the cuboid, sometimes but little exceeding it; gall-bladder with its base turned towards the back. Hab. Madagascar exclusively. |