718 



dorsal diapophyses support each a metapophysial tubercle, which augments as they diminish, 

 and seems to take their place in the eleventh and twelfth vertebrae, the ribs of which have no 

 tubercle. In the twelfth dorsal the metapophysis projects from above the prozygapophysis, 

 and is continued backwards upon a well-developed anapophysis, which commences at once in 

 that vertebra and continues to be developed, although decreasing in length, to the penulti- 

 mate lumbar inclusive. The metapophyses, which are prominent in the anterior lumbar ver- 

 tebrae, gradually subside as these approach the sacrum. The diapophysis has a low rough 

 tubercle on the first lumbar, which is developed into a depressed plate increasing in length 

 and breadth as the succeeding lumbars approach the sacrum. Eight pairs of ribs directly 

 join the sternum, which consists of seven bones and an ensiform cartilage. The cranium has 

 a short paroccipital, and a shorter mastoid which coalesces with the base of a large petrosal 

 bulla. The squamosal is perforated by a venous foramen anterior to the auditory meatus. 

 The malar extends backwards almost to the glenoid cavity. The orbits are separated by a 

 moderately broad and convex part of the frontal, swollen by large air-cells : the orbits com- 

 municate freely with the temporal fossae. The premaxillaries are divided anteriorly by an 

 angular cleft separating in the same degree the anterior or mid-incisors from each other. 

 The lower canines are recognizable, by their relative position to the upper canines, from the 

 contiguous procumbent inferior pair of incisors, which they considerably exceed in size. The 

 lower jaw is remarkable for the great production of its broad and rounded angle : the back 

 part of its symphysis is also unusually produced. The scapula is remarkable for the length 

 and strength of its coracoid process. The humerus is perforated above the inner condyle, 

 but not between the condyles. The interosseous space is considerable between the long and 

 slender radius and the more slender ulna. The scaphoid bone is more produced forwards 

 than the unciforme. The ilium has a strong tubercular process above the acetabulum. The 

 femur is so long as to equal in length seventeen vertebrae of the trunk, measured from the 

 first dorsal hackwards. The fore part of both the astragalus and calcaneum is unusually 

 produced. 



In the skeleton of the Indri in the Zootomical Museum at the Garden of Plants a short 

 rib is attached to the sides of the vertebra answering to the first lumbar in the present 

 skeleton. 



From Madagascar. 



Purchased. 



Genus Stenops. 



Dental formula : i c }, p , m ^=36. 



4632. The skeleton of a Slender Lemur (Stenops gracilis). 



The vertebral formula is : 7 cervical, 14 dorsal, 9 lumbar, 3 sacral, and 6 caudal. The 

 lumbar vertebrae slightly decrease in size as they approach the sacrum. Ten pairs of ribs 

 articulate directly with the sternum, which consists of nine bones and an ensiform cartilage. 

 The humerus is perforated between the condyles and above the inner condyle. The inner 

 digit is opposed to the rest in both fore and hind feet. 



Hunterian. 



