1867.] 



MR. ST. GEORGE MIVART ON THE LEMURID^. 



963 



being somewhat less so, as is the case in M. pusillus. This short- 

 ness of the first premolar is not the effect of immaturity, as I before 

 thought might be the case, as the typical specimen of M. pusillus 

 is fully adult. The predominance in size, on the other hand, of the 

 first over the second upper incisor is greater in M. tmjoxinus than in 

 pusillus. Finally, the tarsus, which, in M. pusillus, is only as 11*7 

 to the length from the snout to the root of the tail, taken at 100, is 

 in M. myoxinus 14' 6 to the same dimensions similarly estimated. 



Thus in the greater inequality of size between the two upper in- 

 cisors on each side, and in the greater equality of length of the first 

 two upper premolars, M. myoxinus is intermediate between M. pu- 

 sillus and C. milii ; but these differences are slight in comparison to 

 the points of resemblance between it and M. pusillus, its tarsal 

 structure (as has been said) agreeing, in size and the proportions of 

 its parts to one another, altogether with that of the last-named 

 animal. 



With regard to Cheiroyaleus furcifer, part of the skeleton of which, 

 as I before said, has been so kindly transmitted to me by M. Al- 

 phonse Milne- Edwards, I find that its skull and dentition agree (as 

 far as the worn condition of the grinders permits comparison) with 

 the imperfect specimen in the British Museum as to the characters 

 enumerated in my former paper*, except that there is a small malar 



Fis. 1. 



Cheiroyaleus furcifer. Scale twice nat. size. 



foramen on eacli side, that the angle of the mandible is decidedly 

 produced downwards as well as backwards, and that there is no trace 

 of a fifth cusp to the last inferior molar. 



I find also conspicuous carotid foramina placed, as in C. milii, near 



* P. Z. S. 1804, p. G22. 



