THE WATER RAT 



485 



extinct, although previously common in the river Stinchar— at first sight 

 supports the above supposition. Thompson, however, states that Sin- 

 claire found " the ordinary animal much more common," so that we may 

 be here only dealing with melanistic specimens of A. amphibius proper. 



DIMENSIONS IN MILLIMETRES AND WEIGHT IN GRAMMES:— 



, J*''!' * ™™' '" diameter. 2 Testis 4 mm. in diameter. 3 Testis 5 mm. in diameter. 

 * Testis 9 mm. in diameter. 6 Testis 6 mm. in diameter. 

 . J^ll these specimens were bom in the year of capture. (Adams.) 



With the exception of these two specimens all were imperforate ; all were born in the year of capture ; 

 and none (including the perforate specimens) would breed before the following spring. (Adams.) 



