ON THE NEW-GUINEA MAMMALS. 179 



40. Hydromys Beccarii Peters. 



The type of this species is from the Key-islands; later ou 

 (Ann. Mus. Genova, 1880, p. 706) Peters exhibited a speci- 

 men from the Fly-river, S. E. New-Guinea, meanwhile 

 Thomas mentions a young from Loria's collections also 

 from N. G., Haveri, mountains behind the Astrolabe Range, 

 near Mt. Wori-Wori (Ann. Mus. Genova, 1897, p. 609). 

 Not to confound with Mus Beccarii Jentink (Notes Leyden 

 Museum, 1880, p. 11, published Nov. 1879), from Celebes, 

 and Mus Beccarii Peters et Doria (Ann. Mus. Civ. Genova, 

 1880, p. 700) from Sorong, N. G. = Mus DoriaeTroxxes- 

 sart (Catalogus Mammalium, 1898/99, T. I, p. 472). 



41. Hydromys esox Thomas. 



The only species with which this water-rat need be 

 compared is H. Beccarii Peters; the typical specimen, an 

 adult male, is from Port-Moresby, British N. G. (Ann. Mag. 

 Nat. Hist. 1906, p. 324). 



42. Leptomys elegans Thomas. 



Very similar in size and general appearance to Uromys 

 levipes; molars strictly Hydromyine in structure, but ^/g in 

 number (Ann. Mus. Civ. Genova, 1897, p. 610). The type, 

 an adult male, is from British New-Guinea — exact locality 

 unknown. 



43. Mus ruber Jentink. 



The type, an adult female, has been described in the 

 Notes from the Leyden Museurd, 1880, p. 18. That speci- 

 men had been collected by von Rosenberg in 1870 at 

 Doreh, New-Guinea. At first sight it resembles Mus neglec- 

 tus Jentink, but is at once distinguished by its very soft 

 hairs, without any trace of flexible spines. 



Notes froiu tlie Leyden JMuseum, "Vol. XX VIII. 



