ioo ALLEN'S NATURALIST'S LIBRARY. 



same size as the type, but is a melanistic variety, for a series of 

 specimens show every intermediate shade between that here 

 described and the BLACK SIFAKA (P. holomelas\ which is of 

 an entirely black colour, and inhabits, as has been shown 

 by MM. Milne-Edwards and Grandidier, the same region as 

 />. edivardsi. 



Distribution. The typical form of the species is confined to 

 the extended region on the east coast of Madagascar lying 

 between the Bay of Antongil on the north, and the River Masora 

 in the south, in the forest-belts on the eastern aspect of the 

 mountains, where rain falls abundantly and the whole region is 

 covered with luxuriant vegetation. Its melanistic variety (P. 

 edivardsi} extends south from the Masora as far as the Faraouny 

 river, but it ranges to higher and colder altitudes on the 

 mountains; while its albinistic variety (P. sericeus) lives in the 

 somewhat warmer region to the north of Antongil Bay, each 

 being, to south and north respectively, conterminous with the 

 central habitat of the typical form. 



II. VERREAUX'S SIFAKA. PROPITHECUS VERREAUXI. 



Propithecus verreauxi, Grandid., Album de 1'ile de la Reunion, 

 iv., pp. 153-162, pis. i, 2 (1867); Milne-Edwards and 

 Grandid., Hist. Nat. Madng., Mamm., i., p. 305 (with 

 full synonymy), Atlas, pis. 4, 6, 8. 



Characters Fur short and woolly ; face entirely naked ; head 

 longer than broad; a well-marked swelling of the skull between 

 the eyes ; the upper incisors sub-equal. Smaller and more 

 robust than P. diademct, the head longer, the hair on the 

 limbs shorter, the tail longer. 



