484 MR. ST. G. MIVART ON THE LEMURS. [May 20, 



f. Skull and horns ( S ) brought by Baikie from Niger. Mus. Brit. 

 '(/. Skull and horns brought by Baker from East Africa (fig. 5, 

 p. 481). Mus. Brit. 



h. Living animal in the Berlin Zoological Gardens. 



The following are specimens representing females : — 

 i. Skull and horns brought by Baikie from the Niger. Mus. Brit. 

 j. Younger specimen from the same locality. 

 k, I. Captain Clapperton's two specimens (fig. 3, p. 478). Mus. 

 Brit. 



m. Living animal at Berlin. 



2. On Lepilemur and Cheirogaleus, and on the Zoological Rank 

 of the Lemuroidea. By St. George Mivart, V.P.Z.S. 



[Received April 15, 1873.] 

 (Plate XLIII.) 



The increase which has taken place in the zoological treasures of 

 our National Collection enables me to offer to the Zoological Society 

 of London, some notes on the Lemuroidea, to supplement the two 

 papers which I have had the honour to communicate to this Society 

 m previous occasions*. 



There are now in the British Museum complete skeletons of Indris 

 diadema, I. laniyer, and Lepilemur mustelinus, as well as no less 

 than three detached skulls of the last-named genus. I find that the 

 new skull and skeleton of /. lanifferf serve to confirm all the cha- 

 racters before attributed by me X to that species, except that the 

 suprazygomatic backwardly projecting process of the malar is rudi- 

 mentary, that the nasal bones become gradually narrower trans- 

 versely from before backwards, and that the fourth metacarpal is 

 the longest. I find also that it agrees with Indris brevicaudatus 

 and differs from the genus Lemur in the following points : — 



1. The spine of the axis is produced forwards, but not backwards. 



2. The spine of the sixth cervical vertebra is largely developed 

 and the most elongated, not counting the axis. 



3. The cervical neural laminae are mediauly notched posteriorly. 



4. The neural lamina of the seventh cervical vertebra is the 

 shortest antero-posteriorly after that of the atlas. 



5. There is a marked, antero-posteriorly directed hypapophysial 

 ridge running medianly beneath the centrum of the 2nd, 3rd, 4th, 

 and 5th cervical vertebrae, each such ridge ending in a posteriorly 

 and downwardly directed hypapophysial process. 



G. There are eight lumbar vetebrse. 



7. The spinous processes of the lumbar vertebrae are subquadrate 

 and nearly vertical. 



* P. Z. S. 1864, p. Oil. and 18G7, p. 960. t No. 15124. 



{ P. Z.S. 186G. p. L51. 



