192 



APES AND MONKEYS. 



Another closely allied form from Brazil has been named the white-necked 

 marmoset (H. albicoUis), and is distinguished from the common form merely by 

 the circumstance that the hinder part of the head and the back of the neck are 

 grey instead of black. 



Black Eared In South-Eastern Brazil there is yet a third nearly related form. 



Marmoset, known as the black-eared marmoset {H. pfnicUlata), of which a 

 representation is gi\'en in the right-hand tigures of the illustration on page 189. 

 The distinctive feature of this marmoset is to be found- in the circumstance that 

 not only the whole of the head and neck, but likewise the tufts of long hairs on 

 the ears, are completely black. 



There are other varieties or species, differing somewliat from either of the 



al>ove in tlie coloration of the liead and ears. 



White-Eared The white-oared marmoset (H. auritu), wliich i.s likewise a 



iiarmoset. Brazilian species, is the representative of a second gi'oup, in which the 



pencil of liairs on the ears is inuch more slender than in the common marmoset, 



while the hair on the back is 

 generallj'^ somewhat speckled, al- 

 though faint traces of banding are 

 occasionally observable. The tail 

 is ringed like that of the common 

 marmoset. 



The general colour of this 

 marmoset is blackish, minutelj- 

 speckled with yellow or a reddish 

 tint on the back ; the sides of the 

 head, the limbs, and the hinder 

 part of the body being pure black ; 

 while the crown of the head is 

 brown, and a spot on the forehead, 

 as well as the tufts on the ears, 

 are grey. In sonie instances, wliere 

 the back is more decidedly red 

 than usual, there are faint, paler 

 cross - bands in this region, and 

 more especially on the loins. 



The white - shouldered mar- 

 moset (H. humeralifer) is a closelj' 

 allied Brazilian form, distinguished 

 by the face, shoulders, chest, and 

 arms, as well as the tufts on the ears, being white ; the thighs being a mixture of 

 brown and white in colour. 



With the silver marmoset of Brazil (H. eJirywIeucus) we come 

 to the iirst of three species, distinguished from those yet noticed 

 either bj' the absence of rings of colour on the tail, or by the arrangement or 

 absence of the longer haii-s on the ears. They are all tiny little creatures, not 

 much larger than a rat, and have no bands of colour on the back. 



f 4 



THE SIL^"ER MARMOSET. 



Silver Marmoset. 



