1873.] MR. ST. G. MIVART ON THE LEMURS. 489 



As to the rest of the skeleton (which is figured entire in Plate 

 AL11I.), 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 rae- 

 dianly notched posteriorly. 



2. There are a median hypapophysial ridge and process beneath 

 the second, third, and fourth cervical vertebra;, which ridges are even 

 more developed relatively than in any of the Indrisince (fig. 7, Hy). 



Fig. 7. 



lins 



Ventral aspect of cervical vertebrae of Lepilemir mustelinm. 

 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 

 b. Ihere are no hyperapophyses . 



7. I find existing 'that very remarkable character hitherto only 

 known amongst Primates, in Homo, Troglodytes, and Indris— the 

 absence ot an os intermedium in the carpus. 



On the other hand — 



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. J s 



4. The tail, though short, is furnished with four small chevron 

 bones. 



5. The naviculare is rather elongated. 



The skull differs from that of the Indrisince and agrees with that 



