79 



if possible, the skeleton should be studied ; especially the skull, in all 

 its details, deserves a very close and minute examination. 



Happily enough we at present need not to err in the labyrinth of 

 defective descriptions and subjective views concerning good or bad spe- 

 cies, as our Flores-specimen differs so widely from all the known Rats, 

 that there can be no doubt whatever, whether it belongs to a hitherto 

 undescribed species. Professor Max Weber proposed to name it after 

 its discoverer: 



Mus armandvilleù 



Measurements of the type-specimen, an adult male, preserved in 

 spirits : 



Mm. 



Length of head and body 420 



Nose to eye 42 



Eye to ear 28 



Ear 34 X 26 



Length of tail , 350 



„ fore foot with claw 47 



„ hind foot 86 



„ skull 66 



„ nasals 24 



„ anterior palatine foramina . 10 



„ molar series 15 



Distance between upper incisor and first molar 17 



What is the length of the fore-arm in the Chiroptera, is the length 

 of the hind foot in the Mures , namely a rather constant measurement 

 for all the fullgrown individuals of a given species. And if we now 

 look over the other large yellow-tailed rats than we find, that Uromys 

 macropus has every way the strongest and most developed hindfeet, 

 so that I will take this species to compare our Flores-species with: 

 moreover Uromys macropus has the precedence above nearly all other 

 allied species, as it has been very correctly described and figured in 

 details by Professor Peters (see Monatsberichte d. k. preuss. Akad. d. Wis- 

 sensch. Berlin, 1868, p. 343, plate). 



Among the other large Rats Mus Imperator from the Salomon-islands 



