MUS MUSCULUS var. M. NUDO-PLIGATUS. 3 



nudo-plicatus — he states that four corrugated hairless Mice, in- 

 cluding a pregnant female, were caught at Taplow. Two of 

 these died, and eventually the female " brought forth five young 

 ones," two of which died, and the other three were reared, but 

 did not breed. This appears to be the only recorded instance 

 that I can find, of a corrugated female breeding in captivity. 

 It was most unfortunate that none of the hairless females that 

 I raised ever bred. Again, as to the question of age, he remarks 

 in the same paper that these Mice were four months in the 

 possession of a man "Bond," and six months in his; whereas 

 five months and a half was the longest life of any of mine, and 

 thirteen of them died when about two months old or less. 



The plate also shows two large, full-grown, corrugated Mice, 

 with bright black eyes ; and any of mine that lived to be three 

 months old were by that time almost if not totally blind ; so 

 much so, that on several occasions they overran the edge of the 

 cage, apparently without seeing it. 



I have quoted from this article to show where my specimens 

 differed from the Mice he possessed. 



All the photographs were taken from living specimens. 



Fig. 1. — Six weeks old. ) r , 1 .. , „ 



t,. n mi ,, . „ Showing corrugations on belly at 



Fig. 2. — Three months old. V ,, 



Tii- o T7i ,,■.,,. these ages. 



Fig. 3.— Four months old. J ° 



Fig. 4. — Three weeks old. Hair coming out round eyes. 



Fig. 5. — Three weeks old. Nakedness showing near eyes, between 

 the ears, and on back. 



Fig. 6. — One month old. Corrugations showing under the hair. 



Fig. 7. — Six weeks old. Hair at base of tail, and on head and legs. 

 Eyes still open. 



Fig. 8. — Four months old. Quite blind, and corrugations very 

 thick. , 



Fig. 9. — Seven weeks old. In this example the eyes are shut on 

 account of the light, and not from the skin near them. 



b2 



