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Show 1873.] MR. ST. G. MIVART ON THE LEMURS. 489 As to the rest of the skeleton (which is figured entire in Plate XLIII.), the dimensions and proportions are given in the Table annexed to this paper; but it is worthy of remark that in several important points it shows a marked approximation to Indris. 1. Thus the cervical neural laminae show a tendency to be medianly notched posteriorly. 2. There are a median hypapophysial ridge and process beneath the second, third, and fourth cervical vertebrae, which ridges are even more developed relatively than in any of the Indrisince (fig. 7, Hy). Fig. 7. Ventral aspect of cervical vertebrae oi Lepilemur musfelinus. Hy, hypapophysial ridge. 3. There are nine lumbar vertebrae. 4. The transverse diameter of the thorax exceeds its depth. 5. The dorsal region of the spinal column is relatively very short. 6. There are no hyperapophyses. 7. I find existing that very remarkable character hitherto only known amongst Primates, in Homo, Troglodytes, and Indris-the absence of an os intermedium in the carpus. O n the other h a n d- 1. The sixth cervical spinous process is rudimentary. 2. The spinous processes of the lumbar vertebrae terminate acutely and are much inclined. 3. The cartilages of the ribs do not expand before joining the sternum. 4. The tail, though short, is furnished with four small chevron bones. 5. The navicularc is rather elongated. The skull differs from that of the Indrisince and agrees with that |
