

cfc* 



PROCEEDINGS 



OF THE 



ACADEMY OF NATURAL SCIENCES 



OF 



PHILADELPHIA. 



1872. 



January 2. 

 Mr. Wm. S. Yaux, Vice-President, in the chair. 

 Twenty-three members present. 



The following paper was presented for publication: 

 " List of the Reptilia of the Eocene Formation of New Jersey." 

 By Edw. D. Cope. 



On a Mite in the Ear of the Ox. Prof. Leidy remarked that 

 he had received a letter from Dr. Charles S. Turnbull, in which 



he stated that while stud} T ing the 

 anatomy of the ear he had dis- 

 covered in several heads of steers, 

 at the bottom of the external 

 auditory meatus, a number of 

 small living parasites. They 

 were found attached to the sur- 

 face of the membrana t} r mpani. 

 Specimens of the parasite pre- 

 served in glycerine, and a petro- 

 sal bone with the membrana tym- 

 pani, to which several of the 

 parasites were clinging, were also 

 sent for examination. These 

 prove to be a mite or acarns, ap- 

 parently of the genus Gamasus. 

 The body is ovoid, translucent 

 white, about f of a line long, and 

 | of a line wide. The limbs, jaws, 

 and their appendages are brown 

 and bristled. The body is smooth 

 or devoid of bristles. The limbs 



1872.] 2 



