1893.] ELEMENT IS ADXTLT SLOTHS. 173 



The interest of the specimen does not, however, cense here. If tlie 



Tbe right side of the pectoral girdle of Bradypus (1), Bicynodon (2), and 



Echidna (3). 



sc, scapula ; a, acromion of do. ; c, coracoid ; me, metaeoracoid ; /, coraso- 

 srapular foramen ; gl, glenoid cavity. 



figure of the pectoral girdle of the Sloth be compared with that of the 

 reptilian Bicynodon (fig. 2), it will be apparent that tlie elements 



