372 DR. F. A. JENTINK. MAMMALS. 



extracted the skull it appears to be a non adult spécimen, the hindmost molars being still 

 in their alvéoles; the skull has a basai length of 98 mm. 



greatest breadth .57 „ 



length nasals . . 43 „ 



palate 59 „ 



diastema . . . . 17.5 „ 



A skull, of an adult spécimen collected at Mûris, July 6. 1903, is still much larger, viz: 



basai length in mm. 



greatest breadth 68 „ 



length nasals 44 „ 



palate 65 „ 



diastema 22.5 ,, 



The skeleton of the Kwatisoré-OT«/i? présents 13 ribs, 13 thorac, 6 lumb., 2 sacral, and 29 caud. 

 vertebrae — as I remarked before, the tail has its extremity wanting — , in the ~K\va.tisoré-fcma/e (a still 

 younger animal) the tail has 31 caudals. 



A very remarkable structure has hitherto been overlooked, namely adult animais hâve 

 the upperside of the base of the tail destitute of hairs; I find this very constantly so in our 

 typical spécimens and also in the spécimens from the collections of the British Muséum, 

 which I had the pleasure of looking through thanks the well known kindness of my friend 

 Oldfield Thomas. Dr. ROTHSCHILD in his paper on Dendrolagus maximus (Novitates Zoolo- 

 gicae, 1898, p. 511) said in a note on the bottom of that page: „on upperside of tail near 

 the root is a large nearly circular naked cushion of a black colour, and corrugated and gra- 

 nulated like the soles of the hindfeet." Hereafter it will grow clear that this statement is not 

 exactly agreeing with the reality. It is a very curious fact that not ail species belonging to 

 the genus Dendrolagus présent the mentioned bald spot, f. i. D. Ltimlwltzi has on the con- 

 trary there long hairs like on the rest of the tail, however marked by a very conspicuous 

 darker patch. Without fresh adult spécimens it cannot be made out whether we hâve hère before 

 us the effect of glands; and as yet there cannot be put a hypothesis as to the question 

 whether it may perhaps hâve something to do with the manner-of-living of the animal; here- 

 abouts I remark that I discovered the bald spot also in Dorcofisïs-specimens ; now it is well 

 known that Dendrolagus is a Tree-Kangarous-genus and Dorcopsis a Ground-Kangarous-genusl 

 I therefore now content myself with describing the facts. By removing the very long hairs 

 of the tail in our spécimens, we see that the tail is like a rats-tail clad with scales, and so 

 we can understand why the bald spot always is and must be scaly and cannot hâve a cor- 

 rugated and granulated apparance like the soles of the hindfeet, if the tail itself is scaly. In 

 young spécimens the tail allover is densely covered with elongated hairs, lateron the hairs 

 disappear on the above mentioned spot just beyond the base of the tail, in maie- as well 

 as in female-specimens. 



iS. Dorcopsis Hageni Heller. 



Plate 16. 

 Dr. B. Hagen collected at Stefansort, Astrolabe Bay, German New Guinea, a maie and 

 a female-specimen distinguished from ail known forms by a light colored stripe along the 



