1873.] MR. ST. G. MIVART ON THE LEMURS. 4lM 



It may be well to add here that :- — 



1. The sixth cervical spine is moderately developed. 



2. There is no hypapophysial ridge beneath the cervical vertebra? 

 (fig. 9). 



Fig. 9. 



Ventral aspect of cervical vertebra; of Hapalemur simus. 



3. The spinous processes of the lumbar vertebras are elongated, 

 pointed, and very much inclined forwards. 



4. The trausverse diameter of the thorax is rather less than its 

 depth. 



5. The dorsal region of the spinal column is of moderate extent. 



6. The cartilages of the ribs are not expanded before joining the 

 sternum. 



7. There are no hyperapophyses. 



8. The naviculare is relatively short (fig. 14, n, p. 501). 



The dimensions and proportions are given in the Table annexed 

 to this paper. 



The last genus to be noticed in this paper is Cheirogaleus. 



I have more than once expressed a doubt as to the validity of the 

 distinctions between Cheirogaleus and Microcebus, which I reduced 

 in 1867* to "a few cranial and dental characters." 



I am now fully convinced that the so-called Microcebi and Chei- 

 rogalei constitute but a single natural genus, which must of course 

 bear the older designation, namely Cheirogaleus. 



Since my last paper on the Lemuridce was published, various skins 

 and osteological specimens have been added to the national collec- 

 tion ; and I had contemplated revising the species as far as the mate- 

 rials at hand would permit. 



Professor Milne-Edwards, however, has very kindly informed me 

 that he is occupied with M. Alfred Grandidier in preparing for pub- 

 * P. Z. S. 18G7, pp. 966 & 972. 



