OTjO capt. t. iiutton on the geographicat. [Nov. 28, 



■with a wide belt of mountain-forests between them ; and the Entellus, 

 as previously observed, being entirely restricted by nature to the 

 warm lowland regions below Allahabad, and to the right or southern 

 bank of the Ganges, cannot very well ascend to the snowy ranges. 



The late Dr. Griffiths, who accompanied Captain Pemberton's 

 mission to Bhotan in 1837-38, does not throw much light on this 

 subject, as he merely says, speaking of the animals, " Monkeys, as 

 usual, abound on the lower ranges, on which the Hoolock of Assam 

 likewise occurs. Some long-tailed monkeys occurred above Bulphai, 

 at 8200 feet above the sea ; and in January I likewise saw a flock 

 of noble ones not far from Tongsa, at an elevation of 5800 feet ; these 

 were white, and in form and size resembled the Lungoors"*. 



This is all very loose writing, and not a single species is deter- 

 mined — besides that the name of Lungoor is applied to more than one 

 species, although Dr. Griffith being a Madras officer may have had 

 the Entellus in his mind. The matter is thus left in doubt, and we 

 know not to what species he alludes, to say nothing of the fact that 

 neither the Entellus nor the Lungoor of the north-west is " vvhite"t, 

 the colour of adults in the latter species being of a dark slate-colour, 

 while the Entellus is of a rusty chocolat-au-lait. Moreover the 

 north-western Lungoor is not by any means likely to occur in the 

 hot regions where the Hoolock of Assam is common, especially 

 when, in the latitude of 30° north, it does not descend lower than 

 2000 feet even in the depth of winter. 



Dr. M''Clelland, who visited Assam in 1839, makes no allusion 

 whatever to the Entellus, although he notices the Hoolock and a 

 species of monkey allied to the Rhesus, under the name of Macacus 

 assamensis. 



All things considered, then, I am inclined to regard the species 

 seen by Turner on the heights as neither the Entellus (which as- 

 suredly does not occur there) nor the mountain Lungoor, but a 

 totally distinct animal, which Mr. Blyth has described in the 'Journal 

 of the Asiatic Society of Bengal,' vol. xii., under the appropriate 

 name of Semnopithecus pileatus, which " abounds on the skirts of 

 the Tipperah hills, retiring far into the interior during the rains, and 

 is common also on the Naga hills and mountainous regions of Sylhet 

 and Chittagong." It is, therefore, by no means difficult to perceive 

 that the next step would carry it to the adjacent region of Bhotan 

 itself; and as Turner was no naturahst, he would in all probability 

 have been deceived by a general resemblance in colouring. 



When speaking of the Entellus, Mr. Blyth remarks that M. Du- 

 vaucel observes, " that the appearance of that species in Lower 

 Bengal takes place principally towards the latter end of winter ;" upon 

 which, Mr. Martin notes that it appears to migrate from the upper 

 to the lower provinces of this part of India. I can only state, con- 

 tinues Mr. Blyth, "that I have found them equally numerous in 

 July and January in the particular locality adverted to, and I have 

 seen them in June close to Calcutta on the opposite side of the river. 



* J. A. S. B. viii. p. 722. 



•J- S. barhei has slioulders and arms externally silvery ! 



