LEMUR 139 



higher groups; the greatest reduction of the lachrymal occurs 

 precisely within the Prosimiae. 



2. It is at its minimum in young individuals. 



3. The genera of each group in which this character is 

 presented have certainly no closer relationship with those of 

 another group. 



4. It can always be traced back to an elongation of the 

 facial cranium, necessitated by a more powerful dentition. 

 This extension of the lachrymal, is, in the Lemurs as well as 

 in the Monkeys, not a primitive condition, but an extreme 

 specialization. 



GEOGRAPHICAL DISTRIBUTION OF THE SPECIES AND SUBSPECIES. 



The species of the genus Lemur are found on the Island of 

 Madagascar and some of the small neighboring islands; Madagas- 

 car, as would naturally be inferred on account of its large size, 

 containing most all of the species, if not indeed all of them, and 

 this island may be regarded as the original home of the genus. On 

 the northern portion of Madagascar from the east to the west coast, 

 from the mouth of the river Antamba and the environs of the Bay of 

 Mazamba to Bombetok (Schlegel), and also on the north eastern coast, 

 (Schlegel, limits not defined), L. fulvus is found. On the same coast 

 from Vohemar to the Bay de Diego is the range of L. coronatus, and 

 from Adampone to Cape Masoala L. variegatus is met with. Still on 

 the north east coast from the Bay of Antongil to Masindrano we have 

 L. albifrons and L. v. ruber; and from Teneriff e to Fort Dauphin in 

 the south L. rubriventer is found. In the rocky lands of the south and 

 south west portion of Betsileo Province, and also in the Province of 

 Anossi, is the home of L. catta ; and in southern Madagascar from the 

 River Tsidsibon to the River Mangonka, L. rufus has its range. On 

 the north west coast from Baly to Marinda, and also on the neighboring 

 islands of Anjuan (Johanna), Comoro, Nossi-be, and Mohilla, L. 

 mongos is found; and from Cape Ambre to Ifassy L. nigerrimus 

 ranges; while from Ifassy to Manaharana are the limits of L. 

 macaco. From Baly to Cape St. Vincent L. rufifrons occurs; and 

 from some portion of Madagascar as given by E. Geoffrey, locality 

 not stated, and also from the Island of Mayotte, L. nigrifrons is 

 found. For L. cinereicefs Milne-Edwards and Grandidier, no lo- 

 cality has been given, those authors having simply published a figure 

 of the species without any description. 



