CEPllALOl'HUS SILVICULTOK. 181 



the British Museum are quite difterently colored; they 

 certainly show the same distribution of colours as I now 

 proceed to describe. 



The remarkable ornament on the back consists on two 

 very distinctly colored parts: the anterior part may be 

 described as a very elongated triangle with a curved base, 

 the top on the middle of the back ; the posterior part is a 

 very broad moonshaped disk having the base of the tail 

 as centre. The triangle is adorned with brownish yellow 

 elongated hairs, they grow longer towards the base where 

 they measure about three inches; these rather stiff hairs 

 are from base to tip uniformly colored and between them 

 there is not a single hair of another, coloration, and just 

 this mode of coloration is of very high importance, for by 

 supposing that the moonshaped disk had been worn off, 

 being originally colored like the triangle, this moonshaped 

 disk ought to be colored like the triangle namely brownish 

 yellow — and we see the reverse : namely this disk has 

 a grizzled appearance, separated from the curved base of 

 the triangle by a pure black band of hairs. The moonsha- 

 ped disk strikingly coinciding with an obvious hollow in 

 the spine owes its grizzled aspect from it being covered 

 with two kinds of very short hairs, viz. black ones and 

 yellowish white ones: along the sides of the disk the 

 black hairs overgrow the otherwise colored ones, they are 

 there rather long and so too on the sides of the haunches : 

 such shining elongated black hairs are also to be found 

 along the sides of the above described triangle, growing 

 longer towards its base: Afzelius very clearly described 

 disk and triangle: »ehmium extremarum regionisque supra 

 »anum sitae cinereo admistus, tergi curvi isabellinus, qui 

 »plagam ibidem magnam format atque oblongam sed pror- 

 :»sum multo angustiorem." 



From the fact that our young specimen shows no trace 

 of the brownish yellow triangle and that the nearly full- 

 grown specimen has that part not so well developed as 

 the adult one, viz. more of an oblong shape, meanwhile 



Notes from the Leyden JVIuseum, "V'ol. XXII. 



