mo.1655, VOTES "\ VERTEBRATES FROM INDIANA HAHN. ;,;:; 



diate. AlS the colors are quite dark and the ear Large, it is thought 

 best to adopt i In- former name. 



Measurements, average of four: Total length, 122 mm.: tail, L9;' 

 hind foot, L6; ear from crown. 6. Cranial measurement of the same: 

 Greatest length of skull, 25.8; basilar Length, 21.2; palatilar length, 

 L2.8; greatest width of braincase, L2.2; depth of braincase over 

 bullae, lo. 0: maxillary tooth row, 6. 



PEROMYSCUS LEUCOPUS (Rafinesque). 

 WHITE-FOOTED MOUSE. 



Here, as in many other places, this is the most abundant mammal, 

 living in all kind-, of place- and eating all kinds of food. Several 



took" up their residence under the house and in the w I pile just 



hack of it. They were numerous under the corn shocks on the 

 adjoining farm, and four were captured within the cave. 



Some misapprehension ha- existed with regard to these cave mice, 

 and it seems necessary to consider their statu- somewhat carefully. 

 Prof. W. S. Blatchley says" of specimens taken in Marengo Cave: 

 "They differed much in appearance from above-ground specimens, 

 having Larger external ear- (13 mm. Long by 11 mm. broad), Longer 

 whisker- i 38 nun.), and more protruding eyes. * * The mice 



have been noted ever since the cave was discovered, but seem 

 to keep close to the entrance, through which, however, no Light 

 pa— ('-.*" Dr. A. M. Banta, who has studied the fauna of tie May- 

 field Cave, in Monroe County, says 6 that the eve- of one which he 

 captured in the cave became -ore when left in the Light. He does 



not -tale under what condition- it w;i- kept, and a- the specie- i- 



chielly nocturnal the same thing might occur if one of the mice 

 which Lived above ground were kept in intense Lighl without any 

 dark retreat. 'The measurements given by both Messrs. Banta and 

 Blatchley are exceeded by many terjjanean specimen- I have taken, 

 and as the eye- are always strongly protuberant I doubt that any 

 of the character- indicate even a Limited amount of racial modifica- 

 tion on account of cave life. Indeed, it i- not certain that the species 

 ha- ever become isolated in a cave. 



A number of white-footed mice were kept in captivity at different 

 time-, but they could not he kept together. On one occasion six were 

 caught under corn shocks and were divided equally between two 

 cages. Next morning each cage contained two partially eaten car- 

 casses, while of the survivors in each canv. one died within a few- 

 hour- and the other a day later. 



Jisi Aim. Rept "i" the State Geologist of Indiana. L896, p. L79. 

 6 The Fauna of Mayfleld's Cave. Pub. 67 of the Carnegie institution, p. 19. 



