DR. F. A. JENTINK. MAMMALS. 371 



safer to include ail spécimens from that island provisionally under one head, lateron the group 

 can be worked out in its entirety. 



15. Petaurus papuanus Thomas. 



a, b. adult maie from Merauke, and a skin with skeleton of an adult spécimen. 



c. d. adult maie and female, Humboldt Bay, June 1903. They lived in the Amsterdam Zoological 



Garden, where they died February 1905; they bred a young. 

 t. maie, in December 1904. 



Although it seems very probable that there are some différences in the spécimens 

 from the différent islands they inhabit and perhaps also between spécimens from the différent 

 parts of New Guinea, I think it at présent not wise to distinguish them by spécifie names, 

 for the very reason we did not in Phalanger orientalis. 



16. Distoechurus pennatus Peters. 



An adult female, collected May 20. 1903 on the Humboldt Bay, may be called the pride 

 of the collection. It seems to be everywhere it lives a rare animal, moreover to be confined 

 to New Guinea. It is known from Andai, the Astrolabe Mountains and the Ethel River; there- 

 fore our new locality is of a very great importance. Evidently the study-material is by far 

 too small to décide the question of local forms ; I remark that a male-specimen, in our col- 

 lection, mentioned by Oldfield Thomas in his catalogue of Marsupials, is much larger than 

 an Andai-specimen. Dr. SEMMELINK cannot say from what part of New Guinea he procured 

 it ; it certainly however cornes from the Dutch half of the island. Ramsay mentions adults 

 and young ones from the Ethel River [Phaîangista pinnata) and stated that the young resemble 

 the adults ; the white stripe down the forehead, however, is proportionally broader. 



The tail of our Humboldt Bay animal measures 137 mm. Towards its end the under- 

 part of the tail is absolutely hairless, like the obtuse end, however wrinkled ; it evidently is 

 an organ for touch and probably slightly préhensile, evidently much more than the tail of 

 Acrobates pygmaeus from Australia, as it is not laterally fringed at the extrême end like in 

 the latter species. 



17. DendrolagUS inustus Miiller et Schlegel. 



There are in the collection two spécimens in alcohol, a maie and a female, both from 

 Kwatisoré, Geelvink Bay, collected August 1903. The maie is an enormous animal, as it pré- 

 sents the following measurements : 



head and body 5S0 



nose to eye 52 



„ to ear 114 



tail (extremity is wanting) 820 



hind foot without nail 140 



„ „ with nail 159 



Thèse measurements hâve been taken from the animal when in alcohol; after having 



